Fenics-ffcx

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- Add support for FErari optimizations, new flag -O

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- Remove verbose output: silence means success
- Generate empty boundary integral eval() to please Intel C++ compiler
- New classes TestFunction and TrialFunction

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- Work on manual, document command-line and user-interfaces
- Name change: u --> U
- Add compilation of elements without form
- Add generation of FiniteElementSpec in DOLFIN formats
- Fix bugs in raw and XML formats
- Fix bug in LaTeX format
- Fix path and predefine tokens to enable import in .form file
- Report number of entries in reference tensor during compilation

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- Add demo Stabilization.form
- Further speedup computation of reference tensor (use ufunc Numeric.add)

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- Report time taken to compute reference tensor
- Restructure computation of reference tensor to use less memory.
As a side effect, the speed has also been improved.
- Update for DOLFIN name change node --> vertex
- Update finite element interface for DOLFIN
- Check for FIAT bug in discontinuous vector Lagrange elements
- Fix signatures for vector-valued elements

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- New fast Numeric/BLAS based algorithm for computing reference tensor
- Bug fix: reassign indices for complete subexpressions
- Bug fix: operator Function * Integral
- Check tensor notation for completeness
- Bug fix: mixed elements with more than two function spaces
- Don't declare unused coefficients (or gcc will complain)