PISM version 0.7 and PETSc 3.6

PETSc 3.6 was released on June 9, 2016. We are currently working on making PISM compatible with PETSc 3.6 and will announce it here as soon as possible.

In the meantime, please install petsc 3.5.4 from here. PISM version 0.7 (stable0.7 branch) works with any PETSc 3.5.X.