Fix .tab files

Removed all the duplicates I could find. All stuff from the Brax update
is in brax.tab, except anything mentioning amulets/soths, which is in
necromancers.tab.
The three node attack files are clearly marked now.
npc_old.tab and npc_new.tab are much the same, except npc_new.tab
contains moods and a few extra (non-ao3/soth related) speech lines.

Included a new batch file, convertbase103.bat, which will convert
brax.tab and npc_new.tab for 103. The npcdlg.txt file present is that
converted file.