[xcode] move all after buildsteps into external 'command' shell scripts for easy diffs
[ios] remove unused XBMC-iOS and XBMC-ATV2 xcodeproject
[jenkins] adjust build steps to point to iOS and ATV2 Target for using the new merged xcode project
[doc] - updated READM.ios for using the merged xcode project
[xcode] remove UnrarXLib{.sln,.vcproj} from xcodeproject