Merge pull request #11 from csferrie/exp-resampler

Experimental resampling functionality
Inherited the clear_cache method to a few more derived models and the direct view parallel model.
Merge pull request #12 from ihincks/master

Inherited the clear_cache method to a few more derived models and the direct view parallel model.
Minor bug fixes, new option to disable LW postselection.
Added Python Tools for Visual Studio solution file.