Migrating to Vaadin 7 + Tycho Based Build System + P2 Repos, etc...

1. Porting Vaaclipse to Vaadin 7.
2. Tycho build integrated.
3. Project provides P2 Repos
4 Contains vaadin 7 patches as GWT defferred binding (i.e. don't needing to build custom vaadin 7 distro)
5. Other changes.