- Needed to increment the next nsobject id to start with by the
  configured operations value, but was using hard-coded 50.
- TCC was not cycling back to 1 after reaching the highest nsobject
  value.
- Implemented routine simplug() in the interactive code to debug the
  plugin for testing.
Add get_logger() to CrawlConfig.py, add tests for it to
tests/CrawlConfigTest..py, minor tweaks to util.py to make
setup_logging() do the right thing.
Copy log() from util.py to CrawlConfig.py and fix tests.
Move part of the logging stack up from util.py into CrawlConfig.py to
allow for which is the default logger to be controlled by the default
config file. Before, opening a default logger, even with a default
config file in place, hit {/var/log,/tmp}/crawl.log. Now, it goes
where the default config says and only hits {/var/log,/tmp}/crawl.log
if no default config is available.