added sample code to browse artists
refactored projects to be used with GWT
prepared Track for GWT
Merge remote-tracking branch 'spinfo/master'

Conflicts:
	wafs.demo8/src/main/java/de/uni_koeln/spinfo/wafs/springbrowser/WAFSController.java
	wafs.demo8/src/main/webapp/jsp/browse_artists.jsp