Minor content errata.

1_3_Martial_Arts.yml:
- Noted that switching out Lotus Root Distillation at Division Realignment
may put the character in XP debt.

1_4_Sail.yml:
- Minor typo fix.
Re-adjust docbook back for biblio item generation.

I tried changing this when I was having PDF build problems,
but the real problem was failing to hyphenate the git hash.

Changing this actually left me with broken links to biblio items,
because only certain DocBook elements can be link targets
(unless you override DocBook styleshees, I suppose)
and citetitle isn't one of them.  I kept the idea of wrapping
citetitle round the item, though.
More SCons work.

SConstruct:
- Don't build all by default (since PDF is slow).
- Add aliases for main targets, and help for those.
- Add "--verbose" option.
- Add correct emitter definition for MAKEHTML
(so that it will trigger a rebuild if the html-building script changes).
- Add a builder for the stats text files.

makehtml.rb:
- Don't bother with "framed-" on the front of the output file name,
since I haven't produced a non-framed version for a long time,
and I need to actually write the output file SCons expects,
or it will re-build every time (since it wasn't actually built).