Pyrosetta.rosetta top-level shim module.
Shim import module exposing the 'pyrosetta.rosetta' extension module as a
top-level 'rosetta' module. This hook imports the 'pyrosetta.rosetta' extension
module then inserts module entries into sys.path for the rosetta namespace.
Not that this technique will not cleanly support 'reload'-ing shim modules,
however as 'pyrosetta.rosetta' is a compiled extension module it does not
support 'reload'-ing in any case. Extension of this mirroring technique to
"reload"-able python extension modules would require implementation of a PEP302
compliant import hook.