Merge branch 'release/0.4.1' into develop
smoketest displaying error running example

Currently, I get this failure trying to run the example:

java.lang.NoSuchMethodError: com.twitter.concurrent.Spool$.syntax(Lcom/twitter/util/Future;)Lcom/twitter/concurrent/Spool$Syntax;
Merge pull request #483 from kscaldef/storehaus_binary_incompat

smoketest displaying error running example
Revert "Merge pull request #477 from twitter/feature/ianoc_frozen_keys"

This reverts commit 6d6606595aa285accccb206c4fbbac947d1852cb, reversing
changes made to 5eebe7719e136c0fa8ee091c049a4d5fc0b53485.
Merge pull request #484 from twitter/revertTFrozenKeys

Revert "Merge pull request #477 from twitter/feature/ianoc_frozen_keys"
Mark the scalding platform as serializable, but also don't grab the platform in the scalding env
Merge pull request #485 from twitter/dontGrabScaldingPlatformInScaldingEnv

Mark the scalding platform as serializable, but also don't grab the plat...
Add fully satisfiable flag to UniqueKeyedService
cleanup ws
Merge pull request #489 from twitter/alexlevenson/UniqueKeyedServiceFullySatisfiable

Add fully satisfiable flag to UniqueKeyedService
Bump version to 0.4.2
Use scalding 0.9.0rc17
Merge branch 'release/0.4.2'