Win fixes

two windows related tweaks

The doc build issue makes clutters 'git status' output after building docs because windows git doesn't handle the sym links correctly (win 7; git 1.9.4).  I think its a decent solution in a bad situation.
Sorry, I tend to be overly terse (particularly before I have had coffee).  

I think it would be best if the error message matched (as closely as possible) what `git status` would print out if run in the top level directory.