Moved models to Model model
Hmm.. do we want to support other persistence layers?
Further refactorings
Added test application basics

- Multilang works, non-multilang doesnt
Made Page aware of its translatanle state
Fixed multilang issues, added tests
Tidying up
Moved $node to Phpcr Doc
Removed "tags" property and ...

- Collapsed PageBase into Page
Removed PageBase
Fixed test
Rebased and removed Base data fixtures class
Added migration instructions
Code review fixes
Added migrator test
Readded data fixtures class
Re-added DataFixtures base class
Updated for latest CMF changes
Merge pull request #55 from symfony-cmf/persistence

[WIP] Persistence