Unified licensing information.

Updated language files.

Minor corrections in CKEditor 4.5.1 only ticket.

Optimized images.

Changelog update.

Used the latest 0.3.0 version of cksource-samples-framework to genera…

…te samples.

Excluded .editorconfig from release package.

Fixed ignoring Gruntfile.js after it has been renamed.

Meta language file updates.

Merge branch 't/12327'