Cython double integral. Having some directory structure problems, so I
will use something more standard.
Lots of file movements. Now using a standard python package directory
structure. Also, added a setup.py script. Added static types to the
double integral function.
Moved tests all into their own directory. Refactored out QuadStrategy
from the Assembler class. More efficient basis function evaluation.
Setuptools is now used.
Implemented a better quadrature strategy. Solving the disk compression
problem.
Implemented interior point calculation. Still testing on the disk
compression problem. Not sure if anything works...
Getting semi-correct values for the disk compression problem.