moving to slf4j
switched to slf4j and updated code to make things work properly
moved from logj4 to logback
continued work on fixing key-value renderer for maps of maps
fixed bug in the key-value renderer where maps of maps weren't read in and processed correctly. Improved the tests by using the object difference to determine whether the reconstructed object truly differ from the original objects
adding logback config file...in progress
added groovy file to test/resources for logback
Merge branch 'feature/slf4j' into develop
Merge branch 'develop' of https://github.com/robphilipp/freezedry into develop