add support to Pump for enumerating the types emitted from Functions
correct some spacing oddities
added withTokensFor method to CascadingHelper to allow specifying classes that need serialization tokens; added test to make sure it works as expected
bump version number
version of withTokensFor that takes a set, so it's compatible with Pump.getEmittedClasses()
Merge pull request #19 from square/pump-find-serialization-tokens

Pump and CascadingHelper support for dynamically detecting serialization tokens