[DOC] Lecture tools documentation

-added new screenshots for exiting tools
-added offline version

[DOC] conference tools documentation

-alarm conference was missing
-badge conference was missing icon
-added offline website generation
-updates rest of tools images

[DOC] meeting tools documentation

-reordered tabs properly (were in a strange order)
-added documentation for offline
[DOC] vidyo search option
[DOC] Rich abstract editor
[FIX] Duplicated name Vidyo error message
[FIX] Hardcoded legacy URL
[FIX] Unnecessary quotes
[FIX] Collaboration.js fix for IE8
[FIX] Broken link in VS guide
[DOC] Moved Alarm Control to Conferences guide
[DOC] Rewording
[DOC] Moved offline website to conferences guide
[DOC] Some pics downscaled to fit in page
Merge branch 'master' into v1.2
[FIX] RegForm: Social Event intro showing HTML
[MIN] RegForm: Removed unnecessary bindings
[MIN] PEP8
[FIX] RegForm: IE8 'class' bug
[FIX] clearableinput IE9 catch backspace/delete
[IMP] ACL in HTTP API only for managers
[IMP] Add all Emails to allowed list