Added CentOS 5.11 (Minimal installation, Chef 12.0.1, VMware Fusion)
Added CentOS 6.6 (Minimal installation, Chef 12.0.1, VMware Fusion)
Added CentOS 7.0.1406 (Minimal installation, Chef 12.0.1, VMware Fusion)
Merge branch 'add_centos_5_11'
Merge branch 'add_centos_7_0_1406'