Fenics

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- Improve configuration of libboost-math

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- Add boost_math_tr1 to library flags when JIT compiling an
extension module

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- CMake config improvements

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- Some tweaks of installation

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- Make SWIG version >= 2.0 a requirement
- Add possibility to set swig binary and swig path
- Add missing const for map_{from,to}_reference_cell

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- Add quadrature version of tabulate_tensor
- Add finite_element::map_{from,to}_reference_cell
- Add finite_element::{topological,geometric}_dimension
- Add dofmap::topological_dimension
- Rename num_foo_integrals --> num_foo_domains
- Rename dof_map --> dofmap
- Add finite_element::create
- Add dofmap::create