Update version to 2.2.3-0-SNAPSHOT
Allow String rendering option values

fixes #939
Fix docs about ssh password options #940
Remove unused files
Remove unused file
Clean up dynamic css: move pngs to assets dir, use rel paths in css

use css class instead of direct image tag for node images
Cleanup css class
Fix workflow editor delete/reorder bug #943
Update version to 2.2.3-1-GA
Update release notes for 2.2.3