Merge pull request #4 from vincentlab/develop

version 0.2.2
Add HLLC Riemann Solver

	new file:   pyfr/solvers/euler/kernels/rsolvers/hllc.mako

	new file:   pyfr/solvers/euler/kernels/rsolvers/hllc.mako
Merge pull request #25 from hpdavis1/develop

Addition of HLLC Riemann Solver.