First commit of Bugzilla data transfer tools.

The javascript is ripped straight from the v2 BOSS Log, and still needs
adapting.
Removed old code, started adding data fetch.

This should work, but is untested as Bugzilla is currently down due to a
server move.
Finished implementing basic functionality.

Further functionality may perhaps include:
* Merging with a specified local masterlist.
* Automated selective extraction of data to remove junk.
* Only fetching "unconfirmed" bugs, or those reported past a certain
date.
* Automatic closing of bugs.