Improve default module behavior

[bloer]

Some of the modules that are included by default are either very specific to a given analysis, or require additional data files to work properly, or are just plain broken. Potential fixes:

• Only register the basic common modules useful to any project
• Make the problematic modules disabled by default
• Make all modules disabled by default, so you have to explicitly enable them in your config file
• Use some sort of factory to register the modules directly in the config file (bleh...)