Updated `clean_paths` and `expand_paths` methods to use `File::FNM_CASEFOLD`
Updated `clean_paths` and `expand_paths` methods to use `File::FNM_CASEFOLD`

This change is an update to an earlier pull request to fix Issue
https://github.com/CocoaPods/CocoaPods/pull/572.

mglidden/CocoaPods,orta/CocoaPods,segiddins/CocoaPods,mglidden/CocoaPods,vivekshukla-mob-ibtech/Repository,ashfurrow/CocoaPods,mglidden/CocoaPods,Ashton-W/CocoaPods,0xced/CocoaPods