Remove a couple of references to non-distributed dims.
Remove constraint on proc_grid_size == 0.

proc_grid_size == 0 is not allowed.
Working tweak.
Tweak formatting.
Make section underlines the same length.
Make dist_type specific bullets into subsections.
Word wrap everything to 79 characters.
Strip trailing whitespace.
Merge pull request #81 from enthought/feature/general-cleanup

General cleanup