Remove all references to sqlite3 in favor of DBIsqlite. Need to
replace DBIsqlite with DBI.
Allow for a list of testcase classes, not just one
Add imports for CrawlConfig, time to support get_config()
Write class DBI to hide the database specific classes.
Replace DBIsqlite with DBI in the app proper. Which database is used
is controlled in crawl.cfg and the app itself doesn't have to know or
care which database is in use.
Tweaks to make things work