update Rakefile to include spec task
import object_set

missed in initial import
add rake dep
add flog, flay, mutant dev deps
wire metrics, mutant into rake
begin to fill in tests for node
continue to flesh out the specs
refactor katuv/node.rb into several separate behavior modules
refactor specs to use shared_examples for each behavior, write naming_behavior_examples
move errant methods where they belong
implement shared behavior for visitor_behavior
add badges, travis.yml