Update tassel version to current
Make chown for R library installation warn only in case group permissions already correct. Fixes #184
Merge remote-tracking branch 'upstream/master'
Install current setuptools at beginning of python libraries. Avoids errors like these:
- https://github.com/pypa/pip/issues/1350
- http://stackoverflow.com/questions/23276866/python-pip-installation-error/23277314#23277314
Yaha does not download at the moment.
Don't pollute log with error messages and return code when only checking for library existence
Don't pollute log with error messages and return code when only checking for library existence (python)
Merge pull request #185 from rchekaluk/master

Misc build cleanups
Merge branch 'master' into nmdp-ngs-pipeline