Strip protocol header from pickles where protocol > 1.
Normalize out pickle sizes / offsets.
Drop the load-time equivalient of 'bytes_as_strings.
Use protocol defined in _compat.
Normalize out pickle sizes / offsets.
Normalize out pickle sizes / offsets.
Fix subprocess-based functest to run correctly under buildout.
Suppress protocol 3 pickle tests on Python2.
Fix 'get_pickle_metadata' for protocol > 1 on Python2.