Fixed ParaView / VTK to use R
Do not look for readline for R unless asked
Fixing issue with a representations ColorArrayName.

If a process doesn't have any points or cells for an output of a filter
than there are problems if we try to set the representations
ColorArrayName property since there is no point or cell data.
Adding in partial bottom cells and first step in adding in meridional heat transport.
Temporary commit.
Just verified that the MOC matches Boonth's standalone version.

This test was done in serial without using partial cell bottoms.
I also refactored a bunch to make it clearer what ghost levels
are being used where. I added in a second output from the reader
for MHT and this isn't working yet though and is causing the tests
to fail.
Serial MHT computation appears to work so am adding in a test.
Changing around the MHT calculation to make it easier to parallelize.
Fixed problems with indopac and atl moc and mht computations.

Everything besides partial bottom cells should be working
properly in serial now.
Making the MHT test a bit more comprehensive.
WIP: First step in parallelizing the MHT computation.
WIP: MOC tests still pass.
WIP: Another commit before trying to take out multiple output ports.

I'm having problems with multiple output ports in parallel so
I'm trying to see if I can get the proper result first in
parallel and then go from there on how to make the reader work.
Code cleanup.
Everything should be working in parallel, except for the stupid pipeline branching stuff.
Splitting the mht and moc computations.

The MHT reader is working in serial now and passes its test.
Fixing the MOC test and renaming it.
Fixed parallel problem with computing southern lat.
Merge branch 'mhtreader_mocreader_split'