Bug 975216 - ping libxcb1 to current version. r=dustin
Bug 975034 - Pin the libraries for mesa for our EC2 test machines. no-op. r=rail
Bug 975216 - upgrade libxcb1 to 1.8.1-2ubuntu2.1mozilla1. r=rail
Bug 966070 - create 4 try masters and a build master in ec2. r=rail
Bug 980311, bump signing limit on mac, r=rail
Bug 946872: upgrade puppet on Ubuntu systems; r=Callek