Fix issue #121.
Issue 102 Fix: old and new page indices were interchanged.
issue 102: swapped indices again
Fix issue #122.
Small refactoring.
Merge branch 'issue_102'
Merge branch 'issue_121'
Merge branch 'issue_122'

Conflicts:
	plugins/de.ovgu.featureide.core/src/de/ovgu/featureide/core/propertypage/FeatureProjectPropertyPage.java