Bug 828674: Add MWC 2013 updates.

Fix bug 840650, 840960, 842285, 842761, 843358
Fix bug 843687, 828671, 829011, 832523, 833468
Fix bug 833871, 839678, 841231, 843323, 843354
Fix bug 843648, 843678, 843692, 843716

Thanks to contributions from:

@sgarrity
@jpetto
@craigcook
@pmclanahan
@Sancus