Moving toward pythonic project layout
- Added uninstall target to Makefile
- bscr help_commands (with * markers on pending commands)
- preserve sys.argv because 'bscr help_commands' needs it (what does
  this break?)
Need to make 'bscr help' and 'fl help' work at the same time
Add 'which_module' and 'which_script' tests for each component