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/NVS/*/map.csv: Taxon Growth Form: mapped to VegBIEN.growthform enum, using http://www.fgdc.gov/standards/projects/FGDC-standards-projects/vegetation/NVCS_V2_FINAL_2008-02.pdf#page=83&section.page=76 . documented values used by each table.

inputs/NVS/*/map.csv: Taxon Growth Form: use new _lowercase() to avoid needing to manually map each value that is already valid but just needs to be lowercased

inputs/NVS/*/map.csv: Remapped with Nick Spencer's suggested changes

inputs/NVS/*/map.csv: Mapped Taxon Growth Form values to growthform enum

Added inputs/NVS/TaxonOccurrence.Understory/