Revert "Merge pull request #41 from edx/feature/kevin/deep_search"

This reverts commit d692c082ab654a5931050c83f43ac8a5a3b934e8, reversing
changes made to c2a53256448f349c7ffcbb1257f6c9bf47d6fbe1.
Merge pull request #44 from edx/hotfix/jim/revert_ds

Revert "Merge pull request #41 from edx/feature/kevin/deep_search"

un-merge deep search, as we've rolled it back on prod.