Icon request: fa-mouse
Please add mouse icon.
If possible right click, left click. Some examples:

![03fd4f9e-0d49-11e6-8b65-c4f04c308af5](https://user-images.githubusercontent.com/13441278/38303331-0c5513ae-3806-11e8-94a9-2233b64f092e.png)

![mouse-left-button_318-48280](https://user-images.githubusercontent.com/13441278/38303329-0c2e2f50-3806-11e8-9684-4c3b4f74ee82.jpg)

![left_click_filled1600](https://user-images.githubusercontent.com/13441278/38303653-ec4ae880-3806-11e8-964b-78cf05867386.png)

my favorite
![mouse-click-vector-set](https://user-images.githubusercontent.com/13441278/38303787-49d6e9fe-3807-11e8-8308-942121b0c0fa.jpg)
https://www.vecteezy.com/vector-art/104904-mouse-click-vector-set

see https://github.com/FortAwesome/Font-Awesome/issues/2376

