convert string,join(collection) to new collection.joinWithSeparator(string) for Xcode 7 beta 6
convert string,join(collection) to new collection.joinWithSeparator(string) for Xcode 7 beta 6

yas375/SWXMLHash,jpsim/SWXMLHash,drmohundro/SWXMLHash,jpsim/SWXMLHash,chrisamanse/SWXMLHash,jpsim/SWXMLHash,yas375/SWXMLHash,chrisamanse/SWXMLHash,yas375/SWXMLHash,chrisamanse/SWXMLHash,drmohundro/SWXMLHash