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).
mappings/: Removed no longer used ".specimens" suffix from maps, which is now the same for all maps
Merged DwC (including DwC1) and VegCSV mappings into new Veg+ schema. This involves replacing occurrences of DwC and VegCSV with Veg+ (or sometimes VegCore) everywhere, as described in <https://projects.nceas.ucsb.edu/nceas/projects/bien/wiki/VegCSV-DwC_merging>.
Generate DwC-VegBIEN mapping as union of DwC1 and DwC2 mappings
mappings/Makefile: Only clean up a core map (intermediate format->VegBIEN) when it's modified. Note that the .last_cleanup files need to be under version control to prevent cleanups upon running any map command in a new checkout.
