Fix for spaces in install directory and in env names
Clearer error for 'conda search' with invalid regex

Closes gh-706

This prints a brief error message saying that the pattern was invalid,
rather than showing the full traceback.
Merge pull request #660 from mwiebe/activatebat_spaces

Fix for spaces in install directory and in env names
Update the CHANGELOG
fix changelog
add release date
cleanup pscheck module
update to work with pscheck 2.0 or higher
update changelog
fix activate.bat
update changelog
Try fixing deactivate.bat for space in the path
update changelog
Merge pull request #724 from takluyver/search-regex-err

Clearer error for 'conda search' with invalid regex
conda clean: Don't exit when there are no tarballs

There might be additional clean actions to perform.

Fixes #753.
Merge branch 'master' of github.com:conda/conda
Merge branch 'master' into rpath