Various PR review fixes

* Changed some single quotes to double quotes
* Moved the files in the cffi package back into the openssl package
  * evp, opensslv
* Changed attrs from ALL CAPS
* Fixed up docstrings
* Stopped using fromlist=['*']
* No fallback on definition imports. You must supply includes, types,
  functions
* Change includes, types, functions to be strings rather than lists for
  now
* Removed teardown since we're not using it right now