#112 implemented offline features in backend to support offline feature. generate manifest files per permutation, and dynamically add them via iframe to browser
 #156 added version tag to nocache js inclusion, to avoid caching problems
Merge branch 'dev' into gwt2goOffline

Conflicts:
	src/main/webapp/index.jsp
use proper gwt version now (not the rc one)
#112 disable rollover behaviour for icons. this wasnt working anyway, and these files were missing in our offline manifest as well
fixed situation where the dev page loads an incorrect manifest
#112 added clientside support for offline functionality
use new rpc caller, which deals with webapp going offline automatically
added notification when yasgui is offline
 #112 implemented an inbetween way of using iframes and servlets. Opted for using servlet as well, as this way we can -overwrite- the previous manifest when there is a new version (i.e. strongname), instead of constantly downloading these 10 MBs for each new version
 #112 added notification whether offline functionality is supported
Merge branch '#112' into dev