sketching out cpotential class
ignore generated c files
add cpotential extension
test file for new cython
c base class
cython stuff
setup extensions
fix relative import stuff
remove package stuff
remove wrong extension
working comparison test for miyamotonagai
starting work on hessian
Merge branch 'master' into potential-overhaul
added lee suto potential
contiguous issue
c contiguous issue
minus sign
tests
oops add packages back to setup
add apw potential