Add file headers and fix module docstring for bridgedb.Bridges.
Fix a bug in bridgedb.Bridges due to catching a non-existent exception.
Remove pprinting of configuration changes from bridgedb.Main.

They went to stdout, not the logger, and they were annoying.
Add file headers and module docstring to bridgedb.Util.
Remove extra EOF newline from bridgedb.Util.
Fix formatting of file headers and module docstring for bridgedb.Dist.
Move bridgedb.Util → bridgedb.util.
Remove old gen_bridge_descriptors docs from sphinx build configs.
Update bridgedb.runner.generateDescriptors to mention leekspin.
Add sphinx build source for bridgedb.txrecaptcha module.
PEP8 whitespace fix for one inline comment in bridgedb.Main.
Remove overzealous logging of config updates in bridgedb.Main.
Remove another pprint from a logging call in bridgedb.Main.