Add role for PostgreSQL
Add role for Python build requirements.
Add role for supervisor
Add role for Sentry
Adds preliminary (but working) Sentry
Merge pull request #14 from chrisseto/master

Fixes variable naming conflict in ssh testing.
Merge pull request #16 from chrisseto/master

Fixes csf | install.
Add huboard link
Remove unused Ansible.apt role
Elastic search is working (?)
Add webservers group
Add uwsgi task
uwsgi depends on apt
Merge branch 'uwsgi'
Merge pull request #12 from lyndsysimon/feature/sentry

Feature/sentry
Merge branch 'master' of https://github.com/CenterForOpenScience/cos-ansible-base

Conflicts:
	site.yml
Add a simple nginx role that installs and runs nginx
Cleaned up a lot of unnecessary files/code
Removed more unnecessary files
Install nginx from source

To make it easier to add/remove modules