Fixes Bug 867315 - Bixie processor

this PR represents a coding the Bixie processor algorithm for turning a raw crash into a processed crash.  It sets up a framework for the application of transform rules to do the actual conversion.  One transform rule is provided to produce a signature.  With no guidance, this is a minimal algorithm.  

When we finally figure out what we really want to do for processing JS crashes, we just need to write functions in the form of the '''signature_action''' found in the code below and then make entries in PG transform rules table under the category of 'processor.bixie'