Bug 933595 - Part 1: Gecko code changes to pass error messages to gaia. r=allstars.chh
Bug 933595 - Part 2: Adding promise to toggleNFC, adding enableRE0. r=allstars.chh
Bug 933595 - Part 3: Marionette tests - error messages,  mozNfc.checkP2PRegistration. r=allstars.chh