Code review comment for lp:~binli/ubuntu/trusty/modemmanager/lp1441095

@Iain, @Seb128,

 In trusty, I have finished the patches, I separated the previous patches based on the upstream commit, I merged these together for convenient in first version, I back-ported modemmanager from master branch(1.5) to trusty(1.0), some data structure was changed which I have updated in the backported patches.

 For Wily, we need to backport these patch from master branch(1.5) to 1.4 which is used by wily, I'm still working on it.

 And yes, if it could be cherry-picks from upstream(1.5) to 1.4, it's the best way, could we let cyphermox to help us? Thanks!