Use premade venv for travis
Merge branch 'master' of github.com:dimagi/commcare-hq into use-premade-venv

Conflicts:
	.travis.yml
Directly invoke the executables in the virtualenv; no more "activate"
Hit couch in a couple places to see where things went wrong with travis
Merge branch 'master' of github.com:dimagi/commcare-hq into use-premade-venv
Merge branch 'master' of github.com:dimagi/commcare-hq into use-premade-venv
Remove some shell piping to try to un-hang the pip install
Revert "Remove some shell piping to try to un-hang the pip install"

This reverts commit 2c3c7a3b4d4a98095ee7b3fd21f4842c68cd75d9.

Discovered that the problem was pip interactively prompting.
Wipe e.g. luna that is alraedy cloned in venv, so that it updates
Try activate to fix coveralls installing to global path
Force distribute install
Reorder installs to confirm it is not a coveralls-specific issue
Temporarily remove coveralls
Remove ts which was masking errors
Force a reinstall of liblapack and libblas
Merge branch 'master' of github.com:dimagi/commcare-hq into use-premade-venv

Conflicts:
	.travis.yml
Fix libblas-dev and liblapack-dev package names
Re-introduce activate
Merge pull request #707 from kennknowles/use-premade-venv

Use premade venv for travis