Merge branch 'major'
Started CKEditor 4.3.1 development.
Mailmap update.
Mailmap update.
Unwrapped scripts from closures and added strict mode.
Changed files structure.
Use package.json to specify dependencies.
Merge branch 't/11167'
Added clipboard plugin as a dependency of widgets since it's needed to drag and drop widget instances.
Upper-cased Image2 and Language button names.
Added a note to Changelog about renamed Image2 and Language buttons.
Fixed: Buggy discovery of image dimensions when changing src in IE9/10.
Changelog entry.
Merge branch 't/11159'
Fixed: Widget drag handler is not fully visible when inline widget is in a heading.
Changelog entry.
Merge branch 't/11198'
Fixed code style issues.
Removed unnecessary code for old Opera.
Docs.