Change to inventory model/generation and begin integrating with refactored code in dataseries.py to generate a filled series of data.  Checkpointing progress.
Add a data_found column to the inventory table for additional accounting.
First cut of inventory generation and gap scan in place, command line args, etc.
Forgot to add the right limiting logic ot the gap scan.  Oops.
Make absolutely references are cleared.
Data storage/processing mods.
Rename since it's not really a sketch anymore.
Toggle skipping blank/null ifaliases (defaults to skip).
Make the arg help string more explicit.
Use oidset.set_name when generating inventory.
Removing script since the logic has been implemented in the modules.
Add logic to catch out of order ifref start and end times, and a new database column in the inventory table to log any runtime issues.
Might as well add issues column the gap inventory as well just in case we eventually need it.
Changes to get ifref information from other tables based on oidset and put in a lower bound threshold for a gap to be considered worth noting.
Changed default gap lower bound threshold back to zero.
Added inventory counter to verbose scan output.
Added some signal handling to be able to exit the scan at graceful points in the process.
Tweak the fill/scan handling so as to avoid lingering references.
Issue query resets explicitly so Django will not eat ALL the memory when this is being run in debug = True mode.
Minor fix to gap series scan (and testing to make sure that switching to git is working right).