FullyImplicitBlackoilSolver: Throw an exception uppon encountering a non-finite residual
FullyImplicitBlackoilSolver: cleanup the residualNorm() method
Merge pull request #111 from andlaus/FullyImplicitBlackoilSolver_throw_exception_uppon_non-finite_residual

FullyImplicitBlackoilSolver: Throw an exception uppon encountering a non-finite residual