Merge pull request 14

https://github.com/johndwells/Minimee/pull/14
Add icon to the EE Debug Toolbar.

https://github.com/johndwells/Minimee/pull/16
Cherry-pick for pull request 17

https://github.com/johndwells/Minimee/pull/17
Version bump: 2.1.12.
Set the icon to simply be blank.