updated uberdocs, updated project with latest deps, new TODOs
added group parameter to all summaries for later multi-dir mode - needs a tad more tests
moved from java BigInteger to clojure BigInt
minor indentation cleanup
updated dependencies, finished test for multiple groups
split FileSummary into two records with common protocol
added some checkers to clarify tests
allow multiple root directories, only print relative directories
bumped version number, upped default memory