Add adapters forlder to build path.
Add jQuery adapter guides.
Add information about promise.
Docs fixes.
Renamed adapters. to CKEDITOR_Adapters.
Add version info.
Add example to event guild.
Update guide:
 - add information about supported version,
 - add information about promise in constructor,
 - add sample for events,
 - add sample for form,
 - update informations about val function.
jQuery guide corrected.
Merge branch 't/10578'