Allow explicit "-2" option for the cythonize script to set the language level to 2 (the current, but not future, default).
Allow explicit "-2" option for the cythonize script to set the language level to 2 (the current, but not future, default).

scoder/cython,da-woods/cython,cython/cython,scoder/cython,cython/cython,scoder/cython,cython/cython,da-woods/cython,cython/cython,da-woods/cython,scoder/cython,da-woods/cython