It's getting better all the time

* Naming for randomizers
* Still need to wire up bindings for randomizers other than alignments
* Need tests for the constants for the names
* Need bootstrap tests testing the new bindings
* Caching proxy for the collections mapper
* Fixing some xml files to use new collection formatting
* Moved dependent data collection to the stress tests, where they are
used
* Got rid of tests that tested test-specific bindings
* Removed datatype bindings for stats and dependent data, use protected
methods instead
* Inject generators and randomizers on stress tests for improved
performance
* Refactor randomizer tests to use base class
* Make randomizers on stress test overridable