Calculate residuals for omitted stars

This code creates a mock gsprops entry for stars which were manually
removed in processing or reprocessing (and hence have no gsprops entry).
With a "mock" entry, the code will continue and calculate residuals
for missing stars if there are centroids available in the
*adat files.  This is not yet implemented for removed FID lights.
Since we now have data that was unused in processing, we store a "used"
status in the saved files (json, shelve, hdf5).
Update mica vv version to 3
Add version to VV h5 and set expectedrows
Merge pull request #24 from sot/plot_omitted_slot

Plot omitted slot