This puts a print command (to Sys_Printf) into the queue making it
easier to check command sequences since regular printf is asynchronous
with the stream.
For now it just manages type encodings via their encoding string,
ensuring types are fetched from the target only once, if at all (may
already have the type due to it being common).
Things were getting rather cluttered with everything being qwaq-* and
all in one directory. Now most have lost the qwaq- prefix and have been
moved into subdirectories (non-recursive make).
