schemas/VegBIEN/taxonomy/: moved into schemas/VegBIEN/planning/
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).
schemas/VegBIEN/taxonomy/higherPlantGroup.xlsx.src.txt: added Brad's comment that there are some holes in the Embryophyte subclasses list, and we need to validate it
added schemas/VegBIEN/taxonomy/higherPlantGroup.xlsx.src.txt with Brad's description of how the names were chosen