added detail-views and journals for planning-elements
make sure, that you use the userfriendly attribute only in the user_friendly block
removed some notes
fixed the journalizing-specs

some extensive stubbing of the journal was needed to test that the api
reports the correct values.
Merge branch 'feature/rails3' into feature/migrate_api_views_to_rabl
removed redundant status, project and type-elements from the index-view
re-added the planning-element detail-view
removed an unnecessary intermediate element from the journals, added a rake task to create some fake projects
Removed a redundant change-element from the journals-xml
migrated projects-api&added json-specs
added missing specs for the rabl-views.
re-added the planning_element_types-route to the api/v2
migrated the planning_element_types to rabl
Migrated the planning-element-type-colors to rabl
migrated the project_types to rabl
all partial-tests will be removed and the code moved into the show-specs
more obsolete partial-specs deleted
migrated project_associations to  rabl
migrated the reportings to rabl
removed the obsolete planning_element_status, migrated the status-views.