Merge fWave header and implementation into single file
Make fWave methods and members non-static
Improve eigenvalue computation in fWave solver
Extend documentation of private fWave methods
Use instance variables instead of method parameters in fWave solver
Change public interface of fWave solver

FWave::solve() has been renamed to FWave::computeNetUpdates(). Parameters have changed as well to make it compatible to SWE1D framework interface
Move fWave solver to 'solver' namespace
Use generic type T instead of double in fWave solver
Add computation of maximum wave speed in fWave solver
Merge branch 'swe1d-integration'