Issue #1 Fix + No longer checking for isImageCorrectSize in post method

Apperantly Instagram no longer cares if your image size is at least
612x612?  I'm no longer experiencing crashes trying to publish smaller
photos.  However, images under 612x612 are scaled to fit 612x612.  This
brings down image quality and I recommend you still check
isImageCorrectSize
Merge branch 'master' of https://github.com/mglagola/MGInstagram