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'

Merge branch 'prevent-dom-clobbering'

Testing environment clarification in changelog.

Update CHANGES.md

Changelog item indentation level corrected.

Updated translations, added Tatar language.