Fixes Bug 887240 - add Bixie crash submission capablity to submitter_app 

this PR creates a new module to be plugged into the submitter_app to allow it to submit Bixie HTTP GETs to an appropriately configured Bixie collector.

This includes refactoring the Breakpad POST module into its own file to ensure that there are no internal file dependencies that would make a Bixie only deployment difficult.  

The Breakpad POST module and the submitter_app itself have no unit tests.  It is outside the scope of this Bug/PR to add those at this time.