Add most recent EVeg classifications file

Several previous files, only adding most recent version to the git repo.

This Excel sheet contains several workbooks:
	Regional Dominance Type Key
	Detailed crosswalk including YHR, PFR, BPS, Regional Dominance Type, and justifications where pertinent
	Simplified YHR-PFR-BPS with acreages (though acreages haven't been updated in a while)
	WHR Size/Cover
	Eveg CFA categories

as well as others not mentioned here because they are essentially out of use.

	new file:   EVeg Classifications 5-22-2013.xlsx