Issue 123: Add unapproved projects filter

- Added the ability to filter projects by approved/unapproved
- Adding a custom filter and preserving the order of existing filters
required overriding of the default filters and declaring them manually
Merge branch 'add_unapproved_filter' of https://github.com/nburkley/codemontage into add_unapproved_filter
Merge branch 'master' of github.com:CodeMontageHQ/codemontage into add_unapproved_filter