FIX: Typo leading to raising an exception
FIX: Enforced model datatype.
REF: pep8 fixes.
REF: 2to3 fixes.
REF: pep8 fixes
REF: pep8 fixes
FIX: Package import paths.
ENH: Improved build process.
FIX: Fixed ignoring build (egg) files.
ENH: Skipped unimplemented test rather than fail