Update README.md
Update README.md
Update KoaPullToRefresh.podspec
add setting refresh view height
add programmatically offsetY for startAnimationg
fix minor bugs
modified refresh logic
fix contentOffset after startAnimation calling
fix bug with collection view
fix leaks with observing
fix bug with content inset and titleLabel alpha
fix bug with observers leaks
fix bug with offsets, disappearing refresh view
Merge branch 'master' of https://github.com/SMCorporation/KoaPullToRefresh

Conflicts:
	Demo/KoaPullToRefresh.xcodeproj/project.pbxproj
	KoaPullToRefresh/KoaPullToRefresh.m
Fixes from SMCorporation/KoaPullToRefresh