Work in progress.
Moving some code preparing for integral generation redesign.
Add initial draft of new integral generation design.
Improve integral/element loop generation.
Improve ordering of arguments in factorized graph and subsequent loop invariant code motion.
Work on quadrature rule code generation.
Element tensor reset code generation.
Add fixmes here and there, plans for cleaning up some data flow problems.
Sketches for new dependency data structures.
Some clean up in new integralgenerator.py design.
Comments and pseudocode in integralgenerator.py.

How to fetch data and generate code for argument
loop partitions and integrand accumulation.
Change dict comprehension to dict constructor.
Add sketches of new partitioning code.
Update gitignore.
Sketches of code generation from possible data structures for factorized integral.
Remove measure() call.
Tiny edit in new integral generation code.
Merge branch 'master' into martinal/topic-generate-integral-redesign
Make factorization tests pass.
Some refactoring in integralgenerator.py.