Merge remote-tracking branch 'devel/uvcdat_but_112_update_paraview_external'

* devel/uvcdat_but_112_update_paraview_external:
  Set INCLUDE_PYTHONHOME_PATHS to OFF for UV-CDAT ParaView build
  add regression test image for mac dashboards
Merge remote-tracking branch 'devel/uvcdat_fix_source_locations'

* devel/uvcdat_fix_source_locations:
  Updated location of pixman download source location
  Do not download source at the root level
Merge remote-tracking branch 'devel/MacName'

* devel/MacName:
  Got UV-CDAT to start saying UV-CDAT instead of Python under Mac
Merge remote-tracking branch 'remotes/devel/allow_system_mpi'

* remotes/devel/allow_system_mpi:
  Allow use of system MPI.