Rework command-line interface and reorganized.

Renamed some commands to make them more consistent and descriptive.
Moved all commands to bin/.  README gives a quick overview of new and
renamed commands. So if you can't find what you are looking for, try the
README and/or bin/.

Simplified build-install-run cycle. Now bin/install.sh will build (if
any changes were made since the last build) and install mousetrap.  You
may manually build using bin/build.sh. Key bash scripts that implement
this new interface have unit tests via the shunit2 framework.  You'll
need this installed to run these tests. (I still need to test the top
level scripts; I won't push until I'm in a place to finish debugging
these.)

Integrated devel/ back into the normal heirarchy. I know I can't make up
my mind. But I think this is better. devel/ is gone.