Added basic support for header, footer and section inset.
Basic demo update to demonstrate the sections header/footer
Fixed
only ask for footer or header if the corresponding reference size is greater than zero
Fix glitches
Merge pull request #1 from samdods/master

Fixed issue causing that causes crash (See full comment)
Merge remote-tracking branch 'remotes/antonielamy/master'

Conflicts:
	QuiltDemo/RFViewController.m