A whole mess of improvements!

- Adding C library support (whoo!)
- Making debug info otional
- Adding option for executable output
- Extending help output and adding license info
- Cleaning up stray newline from YACC (revisit this!)
- Starting to handle library functions (needs work)
- New makefile recipes:
   - c_module
   - modules
   - run
   - install
   - uninstall
   - fresh
- Small tweaks to sample program to match other changes
- A bunch of small fixes and cleanup...