Added calculation of strongly connected components in linear solvers, #889
Fixed incorrect naming of CRSSparsity::stronglyConnectedComponents
Revert "Added calculation of strongly connected components in linear solvers, #889"

This reverts commit 71b3e3c80b07822fc89dea0c83825d60d0db5c02.
Moved implementations from Solve to LinearSolverInternal, #889
Refactoring of LinearSolver, #889
Removing LINSOL_T, #889