Merge branch 'baagaard/binary-packaging'

* baagaard/binary-packaging:
  Use top_srcdir instead of abs_top_srcdir (more robust).
  Created make_package for creating binary package.
Update PYLITH_CHECK_ERROR for PETSc interface changes.

Remove __SDIR__.
Merge branch 'master' of github.com:geodynamics/pylith into maint

* 'master' of github.com:geodynamics/pylith:

* baagaard/fix-error:
  Update PYLITH_CHECK_ERROR for PETSc interface changes.