Updated URLs and paths for IRAS data.
Updated report generation for beefy and kwaltz.
Include convenience script for benchmarking on mac.
Updated doom.sh; added hardcoded path (temporarily); allow more cmd line opts.

The python path should be set by the user. The hardcoded path to the test
parameters should be removed when the parameters are included in benchmark.sh.
Merge branch 'master' of nihal:/users/jcrossle/casa/benchmark
Adding script to append summary files on a mac.
Moved all casa guide parameters into parameters.sh and other changes.

Removed all individual parameter files and replaced them with one file that
contains bash functions that initialize the benchmarking parameters for a given
test.

Added setup script to add benchmarking distribution directory to the shell
execution path.

Removed destination directory initalization from doom.sh.  Instead, run the
setup script to add doom.sh to your execution path.  Execute doom.sh in the
directory where you want the data written.

Added smarts to avoid starting a test on a mac. (This must be done manually due
to a casa bug.) Print the nominal casapy execution command instead.

Added command line option for using a specific version of casa.
Removed parameters files from Makefile.