Replaced the shell script launcher with a cross-platform C executable. * Replaced the Unix-only shell script launcher with a cross-platform compiled executable written in C. * Added several new configuration variables to the SConsctruct script which allows the user to specify where their Python site-packages and executable are located; * Cleaned up the SConstruct script and made it easier to grok.

glob:**.py[co]
glob:.sconsign.dblite