- CONTRIBUTING.md is replaced with a link to the "contributing" section
  of the docs
- Information on build requirements is consolidated in
  "development/dev_environment.rst"
- Build instructions are moved from "build_hints.rst" to
  "development/building_from_source.rst"
- Basic information on running tests is added to "development/testing.rst"
- Git usage is moved from CONTRIBUTING.md to
  "development/dev_practices.rst"
- Basic information on building docs is added to
  "development/dev_documentationrst." The style guide is moved from
  "contributing" to this location.