Bug 925495 part 1.  Move DOMString out to a separate header.  r=smaug
Bug 925495 part 2.  Make the localName and nodeName bindings use DOMString, for extra speed.  r=smaug
Bug 924977 - More proper current working directory handling in mach; r=ahal
Bug 673875: Reproduce the bounce behavior when reaching the top/bottom of the page on OSX. r=smichaud,felipe,masayuki
Bug 868648: Make window overlay scrollbars appear/disappear when 2 fingers down/up trackpad. Credits to Markus for his help getting this right. r=mstange,masayuki,smichaud