moved everything into /trunk/ to create the standard svn layout, for use with tools that require this (eg. git-svn). IMPORTANT: do NOT do an `svn up`. instead, re-use your working copy's existing files with `svn switch` (http://svnbook.red-bean.com/en/1.6/svn.ref.svn.c.switch.html).

Renamed biengeo install scripts to setup scripts.

It seems to make more sense to call these setup scripts, since they are
only setting up the database and tables, and not actually installing any
files anywhere on the OS.

Initial checkin of geoscrub install SQL files.

Added install.*.sql files that will do initial table creation for all
required tables.
Added a truncate.vegbien_geoscrub.sql script that will clear tables related to
data downloaded in load-geoscrub-input.sh....