Improved addPathElement logic
Fixed getFullPaths logic
Fixed genericPatcher logic
Renamed FromObjectMethodProvider to ContentMethod provider

- Corresponds with alias and documentation
Added documentation
Added ContentObjectProvider

- Provider which determines path from a given object
Functional test for peristing a blog post
Added "getRouteByPath" methods to both RouteStack and BuilderContext.

- Uses logical ordered association between path elements and routes
Removed methods re. getRouteByPath

- Not needed as ->find() checks in memory objects too
OK .. everything works again.
Added DateTime path provider
Merge pull request #5 from symfony-cmf/dev

Fixes some bugs