Fix memory usage of update-db

This is really kind of a suboptimal way of doing it, but it's fast and
I'm tired of the problems with development environments taking a million
megabytes to compile S2.

I loosely tested this in my development environment. It's possible that
it breaks in some interesting way.
(Bug 4692) 16 new themes for Crisped

-6 by flatlanders
-10 by nornoriel
-clean-up of font sections of previous themes to remove redundant lines
-one previous theme moved into alphabetical order
-ciel/battleraven.png moved to commons/battleraven.png
-ciel/battleraven theme updated accordingly
Merge pull request #384 from momijizukamori/Bug4692/CrispedThemes

(Bug 4692) 16 new themes for Crisped
(Bug 5055) Amend link to feeds-only view

Update link to feeds-only view of reading page from
?show=Y to ?show=F, in line with FAQ 28 and everything
else user-facing.
Merge pull request #385 from kaberett/bug5055-feeds-view

(Bug 5055) Amend link to feeds-only view
(Bug 1763) Display credit module lines as list items
(Bug 1763) Remove padding from credit links in Librarian's Dream
Merge pull request #386 from momijizukamori/Bug1763/CreditModule

Bug1763/credit module
(Bug 1763) Remove obsolete CSS, fix core2 bug
Merge pull request #387 from momijizukamori/Bug1763/CreditModule

(Bug 1763) Remove obsolete CSS, fix core2 bug