Added some basic logging, a few commands and some cvars.  Not intended to be
functional at this point.

tas_cjmp and tas_dtap is added, though tas_dtap doesn't do anything yet.  Data
such as movedata, dmgdata, HP, AP etc are printed, but not tracedata and
blocking data.
For DMGDATA, output the full displacement vector rather than its normalised
form.  Also removed an extraneous space from DMGDATA output.