Added skeleton of tests for libbuxtonsimple
Changed includes for the check_buxtonsimple.c file, added testing
function skeletons for buxtonsimple-internal functions.
Completed functions for public library

Added setup and teardown functions that fork and kill the buxton
daemon before and after the tests are run. TODO: add tests for the
internal functions
Finished unit tests for buxtonsimple internal functions
Added check_buxtonsimple to Makefile.am, fixed compile errors.
Also made client in buxtonsimple-internals extern. TODO: determine
why tests fail.
Fixed errors in check_buxtonsimple- tests pass now.

TODO: readd checking status and setting errno in buxtond_set_group