Add support for optional debug parameters
Update debug documentation for clarity and accuracy
Add printFields and printTuple interval support
sumByLocalKeys, Counters and Task Numbers
Update README
Fix enumeration
Merge pull request #698 from twitter/readme-irc

Update README
Adds head and sortedTake to KeyedList
Split JsonLine source out of FileSource.
Split JsonLineTest.
Merge pull request #703 from twitter/klin_json_sep

Make Json support a separate module
Pull out scalding-json as a separate module.
Add scalding-json to project/Build.
Added Test for CascadingJob Through Tool.main
Fix CascadeJob NPE
- Overrode validate to iterate over def jobs to call validate on each
  job.
Clean build dependencies.
Remove jackson dependency from scalding-core.
Generate simple json JobStats in Tool.
adds quotes around json value.
Only add quotes fro strings.