Merge branch 'hotfix/0.8.8'
Merge pull request #549 from tomtau/feature/optimizedmatrix

Feature/optimizedmatrix
transient configuration in HDFS.
Merge pull request #550 from twitter/hotfix/0.8.9

Transient Config.
Merge branch 'master' into develop

Conflicts:
	scalding-core/src/main/scala/com/twitter/scalding/Mode.scala
 verify the types of random cascading fields
 better test
Merge pull request #553 from adamilardi/verifytypes

Verify coerced types
Merge branch 'develop' of github.com:twitter/scalding into feature/optimizedmatrix