Fiexed crashes on resize with keepingCropAspectRatio and cropAspectRatio.
It coused by NaN value insert into view frame.
Solved with remove dependency between constrained minWidth and minHeight code.
Merge pull request #41 from ninjinkun/fix-corner-constrain

Fixed crashes on resize with keepingCropAspectRatio and cropAspectRatio
Fixed crash on minimize crop rect with keepingCropAspectRatio.
Change aspect fit timing after constrain minWidth and minHeight.
Update README.md
Merge pull request #42 from ninjinkun/fix-minimize-crash

Fixed crash on keep minimizing crop rect with keepingCropAspectRatio
Apply image scale to cropping rect.
Merge pull request #43 from kishikawakatsumi/scale

Apply image scale to cropping rect.
Add prefix to category method.
Merge pull request #44 from kishikawakatsumi/prefix

Add prefix to category method.
Update podspec
Merge remote-tracking branch 'upstream/master'