Minor cleanups before 0.9.0
Chill 0.3.3
Actually compile
customize the scalding Externalizer
use same hadoop version in scald.rb as in sbt
Merge pull request #623 from fs111/develop

use same hadoop version in scald.rb as in sbt
Merge pull request #619 from twitter/chill033

Chill 0.3.3
TypedSink for VersionedKeyValSource
Use ValuePipe for Scalar2
cleanups + Either methods to the Typed-API
Merge pull request #620 from twitter/some-java-relatedcleanups

Minor cleanups before 0.9.0
Merge pull request #626 from twitter/typedsink

TypedSink for VersionedKeyValSource
Merge pull request #628 from twitter/fix-scalar2

Use ValuePipe for Scalar2
Remove unneeded type parameter
Fix overrides
Fix comments, add some spaces
Merge branch 'develop' into either

Conflicts:
	scalding-core/src/main/scala/com/twitter/scalding/typed/ValuePipe.scala
Handle merges
Merge pull request #633 from twitter/either

cleanups + Either methods to the Typed-API
Allow plugging the joining algo, was needed for highly skewed matrices