for install-data.py to write absolute path to the yaml even when run with a relative path.
Merge pull request #150 from brentp/abspath

for install-data.py to write absolute path to the yaml even when run wit...
Fixes for reported installation issues: new version of ipython-cluster-helper with only IPython 0.13.2 requirement; better error message for missing configuration data; only require configured data when doing loading to allow other functionality to work without data files. Thanks to Amit Indap
Merge pull request #147 from roryk/master

Added optional column of which samples have a variant to queries.
Merge pull request #152 from chapmanb/master

Fixes for reported installation issues
Update requirements.txt
[ISS #155] allow mixture of spaces and no spaces between select columns
Update requirements.txt

Make reqs.txt always pull from HEAD
Add more useful error message if the database does not exist.