Test layout:
 - gcp_test.sh:
   A good, verbose, "my system isn't working" base test.
   Spawns two gtcds in xterms, runs gcp over ssh to localhost
   to copy a file.  You need to be able to ssh in to your
   local machine for this test to work.
   (Uses other_gcp.sh)

 - dot-test.rb:
   A more comprehensive set of tests that don't provide as much
   useful debugging output, but test more things.
   (requires spawn_buffered.rb and unit_test_hack.rb)
