Add support for optional debug parameters
Update debug documentation for clarity and accuracy
Add printFields and printTuple interval support
Fix a bug in LookupJoin
remove commented code
Merge pull request #579 from twitter/fix-lookup

Fix a bug in LookupJoin
Update README.md
Removes closures in TypedPipe, adds Empty
Some cleanups
Some cleanups
Add a type
add a transient
Merge pull request #586 from twitter/typed-pipe-closures

Removes closures in TypedPipe, adds Empty
in Tool save flowstats to json file with the --tool.flowstats switch
saving.
extend flow stats beyond just counters
pretty print flow stats
fix a 2.10 warning
Remove Natty, add DateParser for customizing parsing
Remove default implicit on DateParser