Adds admin panel
Application cleanup

Removes unused models and views
Cleans up migrations
cleans up tests
Clean up specs

Removes unneeded specs from testing
remove unused spec
Add auditing and configured admin dashboard

Adds auditing through paper_trail
Customizes the Milestones admin listing interface

references #80
Update schema for testing
Updates the HTML editor
Merge branch 'feature/admin' into develop
Update gem dependencies