Fix incorrect example in api docs
Cope with LockError being in whoosh.index rather than whoosh.store.
Merge pull request #429 from jelmer/whoosh-cope-move

Cope with LockError being in whoosh.index rather than whoosh.store.
Merge pull request #422 from suryatech/docsFix

Fix incorrect example in api docs
Remove recent and last_bmark code.

- Remove the recent bookmark model helper.
- Remove associated tests.
- Update the tests to skip the popular bookmark test for now due to sql issues
between postgresql and sqlite.