small cleanup to docs
Merge pull request #1347 from reaperhulk/doc-cleanup

small cleanup to docs
Part 1 of rebase, with corrections for pep8
Initial cleanup
Reorder
flake8
Try to simplify
Remove duplicate class and fix name
Added some docs
Added a unit test
A test for DSA
another test
Tests for multi backend
Remove passwords for public keys
document the interface