Update I/O routines to reflect new Dimension initialization syntax.

See #486.
Update I/O routines to reflect new Dimension initialization syntax.

See #486.
Merge branch 'dim_syntax' of github.com:ketch/pyclaw into dim_syntax

* 'dim_syntax' of github.com:ketch/pyclaw:
  Update I/O routines to reflect new Dimension initialization syntax.
Merge branch 'master' into dim_syntax

* master:
  use keyword for name argument in doctests
  tweaks to geometry modifications
update petsc reader with new dimension syntax
Merge pull request #488 from ketch/dim_syntax

Update I/O routines to reflect new Dimension initialization syntax.