Minor tidyup
Minor tidyup

Removed a comment which relates to the bug fix rather than the intent. Replaced a CGRectMake with a CGRectOffset - I find this easier to read!

xxbinxx/VCTransitionsLibrary,HarrisLee/VCTransitionsLibrary,shaohung001/VCTransitionsLibrary,sunyazhou13/VCTransitionsLibrary,hugo-/VCTransitionsLibrary,bb-coder/VCTransitionsLibrary,leonardlee2015/VCTransitionsLibrary,cnbin/VCTransitionsLibrary,stevenchan/VCTransitionsLibrary,ArkadiYoskovitz/VCTransitionsLibrary,ColinEberhardt/VCTransitionsLibrary,ganvinalix/VCTransitionsLibrary,csjlengxiang/VCTransitionsLibrary,junjie/VCTransitionsLibrary,AlexanderMazaletskiy/VCTransitionsLibrary