Removing apparently duplicate code
Deduplicating logic
Marking various places that will need revising for CORDEX
Refactoring to accomodate changes in the files/ directory which will be needed for CORDEX.

More tests are now failing but I think they are contained within tree checking code and p_cmip5.
Removed unused method
Refactoring
Continued refactor to resolve most tests.
Removing redundant translator instance
Moved CMIP5FileSystem class.
Removing unused translator
Moving translator interface into the DRSFileSystem class.

This will allow us to completely reimplement translation for CORDEX.