pantsbuild/pants — pull request #636 by patricklaw (2014-10-04 18:34:07+00:00)
Title: Memoize fingerprints by the FPStrategy hash

* Force __hash__ and __eq__ to be defined for FingerprintStrategy
subclasses.
* Fix implementations of Target.{transitive_,}fingerprint and existing
FingerprintStrategy subclasses.