Rename "General constraints" -> "General comments"
Expand on the genesis of empty buffers.
Clarify conditions in "Empty local buffers".
Make is clear that a couple of degenerate cases are supported.
Make @kwmsmith's suggested edit to Undistributed.
Tweak import in test...

To make the validator more easily usable as a subtree with runnable tests.
Merge pull request #88 from enthought/redo-testing-import

Tweak import in test...
Merge pull request #83 from enthought/feature/general-comments-section

General comments section
Merge branch 'master' into even-more-examples
Added local array plots, and local properties arranged in table to match plot layout.