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).

inputs/VegBank/: refreshed VegBank so that all of Mike Lee's sample plots would be included in the input data. (VegBank was last refreshed from the live DB on 2012-8-30.) split vegbank.sql into vegbank.schema.sql and vegbank.data.sql so that the schema can be examined and imported separately, like for MySQL datasources. inputs/VegBank/vegbank.~.clean_up.sql: commented out setting comminterpretation.commname to NOT NULL, because after the refresh it is now NULL in 10 rows, where commconcept_id is also NULL.