Set -x for bash commands

Setting -x in BASH_COMMON allows us to easily see what's going on
during the various steps firestack is running
Centos support for ceilometer

Centos support for ceilometer packages
Initial heat support

Build heat & heat-client rpms for fedora (tested f19) and centos
(tested centos6.3).

Note heat/centos branch is current ianw github till [1] merged

[1] https://github.com/redhat-openstack/openstack-heat/pull/2
Don't use invalid smokestack branch for ceilometer

I accidently left this branch switch in when moving back to upstream
Merge pull request #41 from ianw/centos

Centos support for ceilometer
Merge remote-tracking branch 'ianw/heat' into heat
Merge pull request #43 from ianw/ceilometer-branch

Don't use invalid smokestack branch for ceilometer
Merge pull request #33 from ianw/set-dash-x

Set -x for bash commands