Merge branch 'release/2013020301'
Merge branch 'release/2013020401'
Added IE shim.
Fixed IE shim.
Updated lists of Premedications and Opioids.
Updated list of post op problems.
Updated list of PRAE treatments.
Installed poltegeist.
Slimmed down .rvmrc.
Improved gas usage factory.
Updated ox. saturation model spec and added matcher.
Added problem_other to post operative problems.
Added breathing problem. Added risk factor symptoms.
Allowed multiple premeds.