Upgrade and refactoring

+ changed return value of getContent method and content property - return single Element
+ add basic test
+ setup Travis CI pipeline
+ add Idea shared files to git
+ add source maps export
+ Update README
+ fix typos in doc comments

Author: ghettovoice

.babelrc

@@ -0,0 +1,11 @@
+{
+    "presets": [
+        "es2015",
+        "stage-0"
+    ],
+    "plugins": [
+        "transform-flow-strip-types",
+        "transform-function-bind",
+        "add-module-exports"
+    ]
+}

.editorconfig

@@ -19,5 +19,5 @@ insert_final_newline = true
 [*.md]
 trim_trailing_whitespace = false
 
-[*.json]
+[{*.json,*.yml,*.yaml,.babelrc}]
 indent_size=2

.gitignore

@@ -1,5 +1,99 @@
-.idea
-*.iml
+### Custom
+
+
+### Linux template
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/dictionaries
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+
+# Sensitive or high-churn files:
+.idea/dataSources.ids
+.idea/dataSources.xml
+.idea/dataSources.local.xml
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# Gradle:
+.idea/gradle.xml
+.idea/libraries
+
+# Mongo Explorer plugin:
+.idea/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### Node template
 node_modules
-npm-debug.log
-/esdoc
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history

.idea/.name

@@ -0,0 +1,9 @@
+branches:
+  only:
+    - master
+language: node_js
+node_js:
+  - 6
+cache:
+  directories:
+    - node_modules

.idea/compiler.xml

@@ -1,3 +1,4 @@
+[![Build Status](https://travis-ci.org/ghettovoice/ol3-popup-umd.svg?branch=master)](https://travis-ci.org/ghettovoice/ol3-popup-umd)
 [![view on npm](http://img.shields.io/npm/v/ol3-popup-umd.svg)](https://www.npmjs.org/package/ol3-popup-umd)
 
 # ol3-popup-umd
@@ -45,12 +46,12 @@ Click on the map to display a popup, click close to the edge of the map to see i
 
 **Properties**
 
-| Name | Type | Description | 
-|------|------|-------------| 
+| Name  | Type  | Description  | 
+|:------|:------|:-------------| 
 | **id** | *number  |  string  |  undefined* | Set the overlay id. The overlay id can be used with the `ol.Map#getOverlayById` method. |
 | **offset** | *number[]  |  undefined* | Offsets in pixels used when positioning the overlay. The first element in the array is the horizontal offset. A positive value shifts the overlay right. The second element in the array is the vertical offset. A positive value shifts the overlay down. Default is `[0, 0]`. |
 | **position** | *ol.Coordinate  |  undefined* | The overlay position in map projection. |
-| **positioning** | *ol.OverlayPositioning  |  string  |  undefined* | Defines how the overlay is actually positioned with respect to its position property. Possible values are `bottom-left`, `bottom-center`, `bottom-right`, `center-left`, `center-center`, `center-right`, `top-left`, `top-center`, and `top-right`. Default is `top-left`. |
+| **positioning** | *ol.Overlay.Positioning  |  string  |  undefined* | Defines how the overlay is actually positioned with respect to its position property. Possible values are `bottom-left`, `bottom-center`, `bottom-right`, `center-left`, `center-center`, `center-right`, `top-left`, `top-center`, and `top-right`. Default is `top-left`. |
 | **stopEvent** | *boolean  |  undefined* | Whether event propagation to the map viewport should be stopped. Default is `true`. If true the overlay is placed in the same container as that of the controls (CSS class name `ol-overlaycontainer-stopevent`); if false it is placed in the container with CSS class name `ol-overlaycontainer`. |
 | **insertFirst** | *boolean  |  undefined* | Whether the overlay is inserted first in the overlay container, or appended. Default is `true`. If the overlay is placed in the same container as that of the controls (see the `stopEvent` option) you will probably set `insertFirst` to true so the overlay is displayed below the controls. |
 | **autoPan** | *boolean  |  undefined* | If set to `true` the map is panned when calling `setPosition`, so that the overlay is entirely visible in the current viewport. The default is `true`. |
@@ -75,16 +76,16 @@ Click on the map to display a popup, click close to the edge of the map to see i
 
 **Params:**
 
-| Name | Type | Description | 
-|------|------|-------------|
+| Name  | Type  | Description  | 
+|:------|:------|:-------------|
 | **options** | *PopupOptions* | Popup options. |
 
 
 #### Members
 
 set **content** : *HTMLCollection*
 
-get **content** : *HTMLCollection*
+get **content** : *Element*
 
 
 #### Methods
@@ -97,8 +98,8 @@ get **content** : *HTMLCollection*
 
 **Params:**
 
-| Name | Type | Description | 
-|------|------|-------------|
+| Name  | Type  | Description  | 
+|:------|:------|:-------------|
 | **content** | *Element  |  HTMLCollection  |  string* | Update popup inner content. |
 
 
@@ -110,15 +111,15 @@ get **content** : *HTMLCollection*
 --------- 
 
 
-**getContent**() : *HTMLCollection* 
+**getContent**() : *Element* 
 
 
 
 
 
 **Returns:**
 
-HTMLCollection - Inner content of popup.
+Element - Inner content of popup.
 
 
 
@@ -132,8 +133,8 @@ HTMLCollection - Inner content of popup.
 
 **Params:**
 
-| Name | Type | Description | 
-|------|------|-------------|
+| Name  | Type  | Description  | 
+|:------|:------|:-------------|
 | **map** | *ol.Map* | OpenLayers map object. |
 
 
@@ -163,8 +164,8 @@ Shows popup.
 
 **Params:**
 
-| Name | Type | Description | 
-|------|------|-------------|
+| Name  | Type  | Description  | 
+|:------|:------|:-------------|
 | **coordinate** | *ol.Coordinate* | New popup position. |
 | **content** | *Element  |  HTMLCollection  |  string* | Replace inner content. |