Add static directories setting. MJ-152

This duplicates changes in https://github.com/DirectEmployers/MyJobs/commit/331a0a315038bea2a6ad18864b1ea91c8c0f3d21, part of pull #82, but master is broken now and I want to get it fixed. This is more maitainable than cherry picking the above and then dealing with a screwed up commit order.

All tests pass.