Bug 883744 - Add pointer null check. r=doublec, a=leo+
Bug 884146 - B2G MMS: Can not receive MMS from Far-stone sim card. r=vyang, a=leo+
Bug 883017 - Send MMS with UTF-8 charset. r=gene.lian, a=leo+

Some MMSC seems to be doing bad things if we don't encode/specify the
correct encoding: SFR and Bouygues Telecom delivers UTF-8 destroyed,
while Free Mobile and Orange did a good job. Setting the charset to
UTF-8 makes those four carriers (and probably a lot more) happy.