Added command line options and bugfixes

Hey! Love this project. 

Added argparse to allow for a '--verbose' option, which helped me find a linking bug by exposing exactly what
'make' was actually doing. Also added a '--save-cmake' option to leave CMakeLists.txt intact so that the user can manually run 'make' if tinkering with options is necessary. Finally, fixed a bug wherein running 'kit remove' with no module name would delete '.' and thus nuke the source tree. Tested all commands and to the best of my knowledge they all work.