major main.c refactoring

- now takes command line arguments:
Usage: ./bin/cosmo [-clsr] [args]

available options are:
-c <in> <out>   compile <in> and dump to <out>
-l <in>         load dump from <in>
-s <in...>              compile and run <in...> script(s)
-r                      start the repl

src/cbaselib.c

@@ -980,6 +980,4 @@ void cosmoB_loadVM(CState *state)
 
     // register "vm" to the global table
     cosmoV_register(state, 1);
-
-    printf("[WARNING] the vm.* library has been loaded!\n");
 }