[AI-483] Initial version of mini expression language tokenizer and parser
Some ideas about the new model
[AI-431] Refactoring of client-side importer
[WIP] before complety ripping everything up
WIP - before reripping everything up again
Working version of schema importer
Fixed problem with attribute group duplication
More experimentation
Merge branch 'master' into experiment-30

Conflicts:
	server/src/main/webapp/WEB-INF/appengine-web.xml
Removed old/outdated classes and files
Refined new model
Removed new ui spike
Reorganized source tree in preparation for version 3
Added minimal MySQL dump for development
Fixed GWT Module configuration