Merge tag '0.96a6' into development

Various bugfixes.
some more blur work,
added neighborhood class
add tests for von_neuman neighborhoods
Added tests for moore neighborhood
remove unused regexes
Add some convience methods in neighborhood for computing a neighbor hood from a n-dimensional matrix of coefficients
More and better tests for neighborhood definition from matrix of coefficients
a bunch of half implemented snippets in stencil kernel2
Bump version for release.
Cleanup import.
Merge branch 'release/0.96a7'
Fix up 2d heat example.
Clenaup laplacian example.
Jacobi example.
Deprecate laplacian example for now.
Merge branch 'hotfix/0.96a8'