Corrects some of the generated names in cython extensions
Corrects some of the generated names in cython extensions

Induced by swithing purify to using cookoff python functionality.

UCL/GreatCMakeCookOff,mbakthav/GreatCMakeCookOff,mbakthav/GreatCMakeCookOff,UCL/GreatCMakeCookOff,mbakthav/GreatCMakeCookOff,mbakthav/GreatCMakeCookOff,UCL/GreatCMakeCookOff,UCL/GreatCMakeCookOff