Ignore all the default BuildPath directories created by the bash scripts
via cmake.bash.

bash might not be in /bin. Don't expect it there.

The compilation process itself doesn't take very long, but it's weird to
let it continue trying to build when we've encountered an error worthy
of changing cmake/make's return codes. This gives clear indication of a
failed build as the last line of the script's output.

- Includes minor fix for MD1

- Includes fix for over-range ScanCodes (would cause hard faults)
- Updated some documentation
- Requires recent kll compiler for the layout

TODO:
 - Add Windows Cygwin support