Add "make checks" target to run code checks.
Add "make checks" target to run code checks.

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