Move the secret key

Move SECRET_KEY from base.py to local_example.py, where it can be
customized

Also put a copy in travis.py, so Travis still works
Get SECRET_KEY from {staging,production}.ini file
Merge pull request #186 from python/remove-secrets

Remove secrets
Remove secrets
Merge pull request #187 from python/hotfix/remove-secrets

Remove secrets
Sysadmin fixes

- on PSF box, users in the `admin` group have sudo privileges
- `/etc/sudoers` is automatically regenerated by PSF Chef recipes, so don't alter it
Fix production DB name
Update changelog
Upgrade Django to 1.4.6
Merge branch 'master' into develop
Merge branch 'hotfix/upgrade-django-146' into develop
Improve pagination

* Override bootstrap's @paginationActiveBackground to be darker gray
* Improve `includes/pagination.html` so we can use it site-wide
* Add pagination to Question list
* Add pagination to Followers/Following lists
* Use sitewide pagination template for list of users
* Use sitewide pagination template for feed aggregator
* Use sitewide pagination template for project list
* Add username and count of answers to Question list
Update test since we changed name for pagination
Merge branch 'improve-pagination' into develop

Fixed Conflict in:
	docs/CHANGELOG.rst
Merge branch 'develop' into twitter-link

Fixed Conflicts:
	docs/CHANGELOG.rst