Refactor of building process.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/io/gmi/chart/builder/ChartBuilder.java
	src/main/java/io/gmi/chart/builder/ChartBuilderContext.java
	src/main/java/io/gmi/chart/builder/ChartBuilderFactory.java
	src/main/java/io/gmi/chart/builder/ChartBuilderFactoryImpl.java
	src/main/java/io/gmi/chart/builder/LineChartBuilder.java
	src/main/java/io/gmi/chart/requests/ChartRequest.java
	src/main/resources/templates/main.tpl.vm
	src/test/java/io/gmi/chart/builder/ChartBuilderFactoryImplTest.java
	src/test/java/io/gmi/chart/builder/ChartBuilderTest.java
	src/test/java/io/gmi/chart/builder/TestChartBuilder.java
Refactor of building process.