Pushing trackDb

Starting with v243 CGIs and the release of the Track Search feature, every time we push the trackDb table, we need to also push the index files that go with it (.ix and .ixx), the cv.ra file, and the metaDb table. With the ThreeStateTrackDb already making things complicated, and with files needing a storage location that is a special case on hgwbeta, we need a standard way to push "everything that needs to be pushed when trackDb goes out". We'll include the hgFindSpec table, as it is often forgotten (it has nothing to do with Track Search).