Bring in cow and write lua-cow with swig
Forget about swig, wrap cow by hand
Update domain_getcomm function
Add an example program to read Mara data in parallel
Fix a critical bug in class.lua
Begin writing script for tuning parallel HDF5 performance
Finish version of the parallel HDF5 diagnostic script
Fix some build details
Add summary table to end of test-mpio.lua

Collective IO causes valgrind errors, and eventually seg faults with
large enough data sets on the Mac.
Add MPI barriers to test-mpio script
Merge branch 'cow'

Conflicts:
	Makefile
	run.lua
Fix a strange memory leak in main due to setting Lua path
Make a directory for Lua modules
Preliminary import and build of Mara physics modules
Replace Lunum stuff with local utilities
Bring Mara.init_prim up-to-date
Allow Mara to run on someone else's cartesian communicator
Add GetPrimNames function to Lua interface
Make several changes improving Mara demo, fix bug in HDF5 module
Allow Mara demo to work in 1d/2d/3d