Add facebook login and refactor project

* Add real facebook login
* Use new xcode6 project structure
* Consolidate iphone and ipad storyboard into one universal storyboard
* Unify coding styles as much as possible
* Refactor sync code
* Implement new login and logout logic by implementing one user per database strategy
* Implement delete list which now also deletes all tasks assiciated with the list
* Pending : migrating guest data into new user data
Disabled WebSocket

* Disabled WebSocket until https://github.com/couchbase/couchbase-lite-ios/issues/480 is fixed.
iOS7 Crash Fixes, Implement Data Migration, and more

* iOS7 Crash Fixes

* Implement old version database migration

* Implement guest to user data migration

* Add framework/README.md

* Remove debuggin logs in ShareViewController.m
Rename Framework folder back to Frameworks

Rename Framework folder back to Frameworks as it's used to be.
Fix migrateOldVersionApp performance

Instead of checking the number of documents in the old database, check the last seq number.
Lower deployment target to 7.0
Fix iOS7 and iOS8 incompatibility issues

* Fix iOS7 and iOS7 UISplitViewController incompatibility issues

* Fix Storyboard warnnings due to unavailable attributes in iOS7

* Fix iPad ImagePickerViewController popover display issue in the portrait mode
Merge pull request #22 from couchbaselabs/facebook

Rework Facebook integration and more