Fixed an issue that would cause circles that were drawn in odd-sized rects to have flat edges.

See http://mdznr.com/dT for a visual comparison before/after.
Resolved an issue that would cause circle progress views to "crack" at various sizes and progress levels due to rounding of the radius.

See http://mdznr.com/dU for a visual comparison.
Merge branch 'master' of https://github.com/soffes/SAMCircleProgressView
Moved animated gif under ##Example to match other SS repositories
Merge pull request #2 from mdznr/master

Fixed an issue that would cause circles that were drawn in odd-sized rec...