upgraded js
fixes #36: added composer.json
Remove the requirement yii

If yii installed without composer.
Autoload class file
Imperavi redactor updated to 9.1.5
removed autoload section from composer.json
Merge pull request #41 from yupe/master

removed autoload section from composer.json
Fixes #42: Updated js to 9.1.6
Updated redactor to 9.1.7
Imperavi redactor updated to 9.1.8
Merge remote-tracking branch 'upstream/master'