JSCS: fixes for missing errors.
Removed JSCS comments surpressing errors which are not thrown in the latest JSCS version.
Updated .jscsrc according to https://github.com/ckeditor/ckeditor-boilerplate/issues/2.
JSCS fixes after recent .jscsrc update.
Merge branch 'master' into major

Conflicts:
	core/editable.js
	tests/core/tools.js
	tests/plugins/forms/textarea.js