Added @override keyword at some actions and views
Parity with pages plugin in Elgg 1.8.16.
Fixed fatal exception when etherpad server is stopped.
Just add full screen link when in full view.
Improved error handling.
Refactored etherpad sessions.
Support for multiple opened pads.
Bumped 1.8.0 version
Merge branch 'release/1.8.0'