Update README.md
Add CI config.
Add Tests scheme..
Add Tests scheme..
New userHasModifiedCropArea property

Allows to check if there is actually something to crop already.
For instance to show/hide an Apply button or to prompt user to accept/discard an unfinished crop.
Merge pull request #13 from rivera-ernesto/userHasModifiedCropArea

New userHasModifiedCropArea property
Merge branch 'fix_aspect_ratio' of github.com:rivera-ernesto/PEPhotoCropEditor