fit width for label
add title image support
fix arrow position when rotating
improved style
adjust trangle view y position
fixed can't release memory issue

datasource strong -> weak
Merge branch 'traintrackcn-master'

# By traintrackcn
# Via traintrackcn
* traintrackcn-master:
  fixed can't release memory issue
  adjust trangle view y position
  improved style
  fix arrow position when rotating
  add title image support
  fit width for label

Conflicts:
	UIScrollViewSlidingPages/Demo/TTViewController.m
	UIScrollViewSlidingPages/Source/TTScrollSlidingPagesController.h