[FIX] ComputeFieldGradient
cosmetics
Navier-Stokes working finally, with correct wall bc
Splitting in 2 plugins, introducing DCM for Discontinuous Collocation Methods
Addition of Optimized Explicit Runge Kutta schemes as in  Parsani et al. (2013)
use new optim_erkls in test
Update optim_erkls readme
Removed old files
Merge branch 'master' of github.com:coolfluid/sdm

* 'master' of github.com:coolfluid/sdm:
  Update optim_erkls readme
Update README.md
Update README.md
BR2 scheme in separate library