Changed the header nt2/table.hpp where it was still included. Todo : remove tables from wrapper functions to lapack/magma and switch to containers.
Added wrapper to lapack kernel trsm to solve triangular systems.  Added sne function to solver least square problem with semi normal equations, csne with iterative refinement and mcsne with mixed-precision iterative refinement. Also added a function llspgen for testing purposes ( generates a linear least square problem  min(Ax-b) such that cond(A) = n^q and residual norm = nr).