Add role for PostgreSQL
Add role for Python build requirements.
Add role for supervisor
Add role for Sentry
Adds preliminary (but working) Sentry
Add huboard link
Remove unused Ansible.apt role
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
Install nginx from source

To make it easier to add/remove modules
Put all example group vars in a gitignored folder
Merge branch 'master' into nginx
Ignore the correct directory
Enable
Add nginx conf template task

Also configure gzip and naxsi modules