First cut.
Partial body centered test passing.
std::map -> std::set
Barycentric test passing.
Bodies test.
More tests and bug fix.
Fix plugin test.
Lint.
Merge pull request #301 from eggrobin/redundant-indexing

std::map -> std::set
After egg's review.
Merge pull request #305 from pleroy/TransformsTest

Test for Transforms.