various updates:
- optimized derived features for EClass
- renamed Einteger to EInt
- set a value now triggers a change:featureName event
- add a value to an EList now triggers an add:featureName event
- various fixes and updates
- support for href elements during parsing
Fixes eType setting for resourceSet feature.
moved files
reworked edit part:
 - rearrange files into folders for each different widget
 - uses less for styles
- updated tests
- added tests for xmi support
moved Ecore.Editor to Ecore.Edit
added LabelProvider
- rebuild dist
- updated grunt file