bringing PETSc and svLS back to the master

make the residuals echoed in the log of PETSc and Native solver the same and switch petsc b vector construction to ADD_VALUES (let them do the global completion) likely fixed scalar solve bug as well

Finally, we have all solvers in one branch, Compressible (Native/PETSc), Incompressible (leslib,svLS). Note CmakeLists.txt needed to set shared libs to no after PETSc set it to yes and fouled link.

new files or files that moved from one directory to another in merge