Removed unused packages and updated usage documentation

- Removed directories for HighchartsStExtensions and HighchartsStPharoExtensions
- Updated Usage Examples

docs/UsageExamples.md

@@ -1,49 +1,8 @@
 # Usage Examples
 
-To have Highcharts working, the only thing you must do is to register the wanted HighchartsLibrary into your app root class (notice there are 3 possible subclasses of it). Example:
+After you load the *HighchartsStExamples* and *HighstockStExamples* packages, demo applications will be installed and initialized, so you can explore how to create charts using HighchartsSt.
 
-```smalltalk
-yourApp
-		addLibrary: JQDevelopmentLibrary;
-		addLibrary: Highcharts8OnlineLibrary.
-```
-
-Then you can render a basic chart like this:
-
-```smalltalk
-renderBarGovermentComputersChartOn: html
-
-	| chart series data |
-
-	data := OrderedCollection new
-		add: (ChartDatum belongingTo: 'Facebook' withValue: 515333);
-		add: (ChartDatum belongingTo: 'YouTube' withValue: 178001);
-		add: (ChartDatum belongingTo: 'GMail' withValue: 154504);
-		add: (ChartDatum belongingTo: 'Twitter' withValue: 184083);
-		add: (ChartDatum belongingTo: 'Amazon' withValue: 100762);
-		add: (ChartDatum belongingTo: 'Pandora' withValue: 78868);
-		yourself.
-	series := ChartSeries named: 'John' composedOf: data.
-
-	html text: 'chart: '.
-	chart := html highcharts newChart.
-	chart yAxis title text: 'Visits'.
-	chart legend enabled: false.
-	chart chart type: 'column'.
-	chart title text: 'Sites visited on D.C. government computers'.
-	chart subtitle text: 'Source: District of Columbia'.
-	chart xAxis title text: 'Site'.
-	chart xAxis type: 'category'.
-	chart plotOptions column colorByPoint: true.
-	chart plotOptions column dataLabels enabled: true.
-	(chart addSeriesForType: 'column')
-		index: 0;
-		name: series name;
-		data: (series dataAsPointsOn: html).
-	html div script: chart
-```
-
-The default installation of Highcharts includes some examples. You can start your Seaside adaptors, for example like this:
+The only step required to access the examples is to start your Seaside adaptors, for example like this:
 
 ```smalltalk
 (ZnZincServerAdaptor port: 9999)
@@ -52,3 +11,5 @@ The default installation of Highcharts includes some examples. You can start you
 ```
 
 And then watch the live examples with your browser in `http://localhost:9999/HighchartsDemo` and `http://localhost:9999/HighstockDemo`
+
+You can check how the charts are built by browing *HighchartsDemo* and *HighstockDemo*.