Merge branch 'release/0.8.3' into develop
Fix scaladoc link.
multi module.
Merge pull request #302 from twitter/multi_module

Multimodule support for Scalding's SBT build
Merge pull request #320 from twitter/feature/doc_link

Fix ScalaDoc Link in README.
add scalding date and scalding args.
Merge pull request #321 from twitter/feature/scalding_date_args

Pull out scalding-date and scalding-args.
Added a write that takes a Mappable to TypedPipe, removed write that takes a Source. Fixed tests in TypedPipeTest
Merge pull request #323 from ccsevers/mappable_write_clean

Mappable write from a clean branch.
Add exception handling to scald.rb

This will allow the scald.rb script to accept --help parameter (and give help as a result)
Merge pull request #326 from willf/develop

Add exception handling to scald.rb
Add sample method to RichPipe
Add return types to limit and sample
Merge pull request #327 from willf/develop

Add sample method to RichPipe
Update scripts/scald.rb

Update for the refactored away build.sbt as well as accommodate
the new sbt version format in version.sbt. Fixes #325
Merge pull request #331 from rickeyvisinski-kanban/patch-1

Update scripts/scald.rb
Update Build.scala to include scalding-args

with this change,
sbt 'test-only com.twitter.scalding.ArgTest'
finds the class and works
Merge pull request #335 from tchklovski/patch-1

Update Build.scala to have scalding pull in scaldingArgs
Add seed to sample method on RichPipe
Binarize for document frequency