Cassandra classes, but Mongo code, so will not work as yet.
Cassandra support about half-way done.

Added schema creation during connect.
Now no errors, but some critical import logic is commented out.
Now ingests raw log data into Cassandra, but no stats and so no data
display as yet.
Basic features, mainly the host page and views, are now working.

Also some styling tweaks to improve layout.
Removed some now-inappropriate caching.

There is no DAO as we are using CQL3 directly, and so caching the
objects is not safe.
Styling and label fixes.
Fixed up domain handling and presentation.
Fixed up domain handling across all components.

A host can only have one subdomain.
Fixed virus logging and display.
Fixed up start-end time updating, and total urls, and some presentation tweaks.
Timelines now essentially working, with hard-coded crawl_id.

Will need to loop over crawl IDs in the code, and extend the API.
Removed hard-coded crawl_id, now scans over all.

But not clear if this will work as expected for multiple crawls.
Added a by-crawl-id stats method.
Laced-through changes for per-crawl stats.

Not supported by the Mongo backend as yet.
Global revisit record counting now works.

Annotations should probably not be exposed directly via the API.
Some effort to create the graphs for the hosts page.

Implemented the host histograms (i.e. host distribution of robots 
block percentage), using the older model, but it doesn't really work.
Need to switch to counters or possible direct histogram building.
Fixed monitoring switch.
Added a python utility script.

Currently able to add log files to be monitored, directly from the CLI.
Average Retries graph now basically working.

Rather slow, due to clumsy implementation, but working fine.