[FIX] Add currentAW to ContextManager in http api

- Closes #1351
[FIX] regular expression for sessions in rec.mgr.
[FIX] Timetable contrib details speakers list

- Closes #1356
[FIX] Rename getLinkRoomIp to getLinkRoomAttribute

- More generic because we can get different attributes
[IMP] Ravem API calls added for vidyoparonama

- Closes #1343
[IMP] OAuth: Return expiration when get AccesToken
Merge branch 'v1.1'

Conflicts:
	indico/MaKaC/plugins/Collaboration/Vidyo/handlers.py
	indico/MaKaC/plugins/Collaboration/tpls/BookingDisplay.tpl
	indico/MaKaC/plugins/Collaboration/tpls/EventDetailBanner.tpl
	indico/MaKaC/plugins/Collaboration/tpls/VideoService.tpl
	indico/MaKaC/webinterface/rh/oauth.py