refactored djinn to use proper log levels
added all logging levels, and clarified docstrings on existing levels
raised logging level to INFO
updated log levels in all appcontroller libraries
updated cassandra interface to use correct log levels
fixed broken unit tests
aborting if we can't find our location in the node map, and fixed unit test accordingly
merged with testing
Merge pull request #479 from shatterednirvana/appcontroller-uses-proper-logging-levels

Appcontroller uses proper logging levels