Finish up stencil convention changes

Chris had been working on this prior to his departure. It changes convention on how we specify extents/offsets for creating stencils There is a branch new-stencil-convention that implements this, but it needs to be tested against all downstream apps prior to merging.

Two things to be done here:

• Document the changes in Doxygen
• Test downstream apps (coordinate with app owner listed below)
  • ExprLib (James)
  • PoKiTT (Nathan)
  • ODT (James or Josh)
  • LBMS (James or Derek)
  • Wasatch (Tony)

Basic workflow (apply for each downstream project):

1. Build new project that uses SpatialOps with master branch. Run tests - everything should pass.
2. Build new project with new-stencil-convention branch of SpatialOps. Run tests - not everything will pass.
3. Discuss failing tests with developers of that project. Help them fix failing tests.
4. Repeat with a new project.