addon.omh: add pycppad to list of addons.
addon.omh: add pycppad to list of addons.

wegamekinglc/CppAD,kaskr/CppAD,kaskr/CppAD,wegamekinglc/CppAD,wegamekinglc/CppAD,kaskr/CppAD,kaskr/CppAD,kaskr/CppAD,wegamekinglc/CppAD,wegamekinglc/CppAD