Renamed service ``doctrine_phpcr_...` tree model and associated stuff

- To ``doctrine_phpcr_odm_...``
- Because we need ``doctrine_phpcr_form_type`` for the PHPCR tree type
Changed name of form service to be more concise
Update CHANGELOG.md

Fixed formatting on CHANGELOG
Merge pull request #83 from dantleech/form_service_rename

Renamed service ``doctrine_phpcr_...` tree model and associated stuff
patch by @elHornair to properly instantiate the logic exception