Support ARC on iOS 4
Check if view controllers responds to iOS5 selectors
Add support for iOS4
Support custom hight and position of header view
Support custom header bar
Allow setting tab bar control manually
Migrate library to ARC support
Update JCMSegmentBar protocol
Merge remote-tracking branch 'refs/remotes/origin/arc' into header

Conflicts:
	JCMSegmentPageController.h
	JCMSegmentPageController.m