ADDED THREAD ! Minor changes on other libs.

To communicate with a thread, use sockets on localhost, this should work.
Or use the return code, or the "last error", but that's crappy.
For the return code, just `return <number>`; only works with integers.

source/ctr.c

@@ -114,6 +114,13 @@ The `ctr.mic` module.
 */
 void load_mic_lib(lua_State *L);
 
+/***
+The `ctr.thread` module.
+@table thread
+@see ctr.thread
+*/
+void load_thread_lib(lua_State *L);
+
 /***
 Return whether or not the program should continue.
 @function run
@@ -171,6 +178,7 @@ struct { char *name; void (*load)(lua_State *L); void (*unload)(lua_State *L); }
 	{ "audio",  load_audio_lib,  unload_audio_lib },
 	{ "apt",    load_apt_lib,    NULL             },
 	{ "mic",    load_mic_lib,    NULL             },
+	{ "thread", load_thread_lib, NULL             },
 	{ NULL, NULL }
 };