Update .editorconfig and package.json

Author: sibartlett

.editorconfig

@@ -10,3 +10,9 @@ indent_size = 4
 indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
+
+[*.yml]
+indent_size = 2
+
+[*.yml.sample]
+indent_size = 2

package.json

@@ -8,7 +8,8 @@
     "start": "node app.js"
   },
   "engine": {
-    "node": ">=0.8"
+    "node": "0.10.x",
+    "npm": "2.1.x"
   },
   "repository": {
     "type": "git",