adding launch application on finish combobox and functionality
do not display combobox when commands are not specified
Fix for JDKPanel initializing wrong Java dir; Fix alignment of combo box in FinishPanel
Merge branch 'master' of https://github.com/ctitorenko/izpack

Conflicts:
	izpack-panel/src/main/java/com/izforge/izpack/panels/jdkpath/JDKPathPanel.java
	izpack-panel/src/main/java/com/izforge/izpack/panels/path/PathInputPanel.java