updated for qx 3 and 3.5
verified 3.5 compatibility
added qx 3.5 compatibility
Merge branch 'master' of https://github.com/qooxdoo/contrib-catalog

Conflicts:
	contributions/CanvasCell/trunk/Manifest.json
	contributions/QxDyGraphs/trunk/Manifest.json
	contributions/QxJqPlot/trunk/Manifest.json
fixed conflict
Merge pull request #2 from oetiker/master

contrib updates for qx 3.5