refactoring card storage WIP
pane entries WIP
add user_dashboards
start sync of dashboards
Sync dashboards upon login
WIP pane data
add pane entries relationships
Move pane entry write functionality to PaneEntriesController
Spec and implement the PaneTypeUserEntriesController
serialize pane entries
Merge remote-tracking branch 'origin/master' into card-storage

Conflicts:
	app/controllers/cards_controller.rb
	app/models/pane_type.rb
	spec/controllers/cards_controller_spec.rb
fix convenience methods