correct pull request

it seems that the previous request was wrongly formatted.
here is the correct one:
- Since changing the service implies too many modifications of the controllers, 'buildingService' is reinstated to the old version. 'timeline' appears to work.
- there is also a new 'BuildingSvc' in /scripts/building if you wish to use the Restangular methods.

TODO:
- it would be nice to freeze the datamodels for portfolio and buildings.

IN PROGRESS:
- BuildingSvc & BuildingCtrl can get() and post() to api. Still need to put() & delete().