Bump to dev version
Add in activation / deactivation scripts from conda
Doh -- fix some old typos
Adjust setup.py to install the correct scripts
Adjust to take into account quoted strings

There's some oddities in stripping quotation marks from an empty string.
Using the %~N syntax takes into account quoted strings and strips the
quotes from it.  I've tested this in Windows XP.

Side benefit -- it's easier on syntax highlighters.

cc: @asmeurer @mwiebe
Add support for conda-env based activation (v1.2.0)