Remove appcompact-v7 dependency from the library.
Honor setMaxFaces(int).
Return a "complete" transformation key.

Using a transformation key with the current FaceCropper config, allows us
to properlly use Picasso's cache.

To support this, I had to add a getSizeMode() method to FaceCropper.
The enum was already public, so a getter makes sense.

Also asked for a RGB_565 bitmap in Picasso's RequestCreator, so we don't
have to convert it later, causing extra GC.
Avoid allocating PointF's in a loop.
Merge pull request #1 from sergio91pt/rm_dependency

Remove appcompact-v7 dependency from the library.
Merge pull request #2 from sergio91pt/honor_max_faces

Honor setMaxFaces(int).
Merge pull request #4 from sergio91pt/point

Avoid allocating PointF's in a loop.
Merge pull request #3 from sergio91pt/picasso

Return a "complete" transformation key.
Merge branch 'master' of https://github.com/lafosca/AndroidFaceCropper