Patch from Dan Scott to make the slimpac I18N friendly(-ish):

Patch from Dan Scott to make the slimpac I18N friendly(-ish):

The attached patch enables the slimpac (the accessible, basic HTML
version of the OPAC), to support various translations of the search
forms by reusing the existing opac.dtd.

There are a few extra strings that we'll have to translate for
complete fr-CA support, but it's mostly there.

Note that the search _results_ are not yet i18n-ized; there's a fair
bit of work remaining there (thanks unAPI!). Also note that the method
used here changes the slimpac path from /opac/extras/slimpac/ to
/opac/ll-LL/extras/slimpac/ - although I do, of course, include a
redirect from the old /opac/extras/slimpac/ to
/opac/en-US/extras/slimpac/.

Finally, also note that the locale passing method may be subject to
change, or at least become more flexible, when OpenSRF sessions learn
about locales.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@7575 dcc99617-32d9-48b4-a31d-7c20da2025e4