Version 2.2.0 preview

Updated to the last version of Mce (4.1.1) - it seems some updates will
come in the following days, so I'm going to wait a little
- The last version of Mce has a new color picker, is compatible with
some markdown syntax, allows users to set a background to the table
cells or row, etc. So this addon has been modified to make it compatible
with these new functions
- The addon is now compatible with the XenForo Smilie Categories. The
smilie integration has been deeply modified in the background
- The previous release on Github had already some fixes. Special thanks
to Xon who contributed a lot to optimize the program