start refactoring to move away from the singlton stuff i tend to do these days.
new DataSets class to handle compiling lists of branches/data sets.
add code climate test coverage.
add image_magician test and refactor unpacking of raw response from imagemagick compare call.
add Manager class to wrap the stuff the rake tasks will do so we can test them a bit better.
remove test_app logs from repo.
remove path info from manager_test:compare outputs. duh.
add sort to DataSets.sets_available.
Merge pull request #2 from QuantumGeordie/big_class

Big class