Additions to README
Merge pull request #51 from chrismo/readme_for_capybara

Additions to README
pinning dbcleaner to lower version due to https://github.com/bmabey/database_cleaner/issues/224
adding env variable to run vulnerability tests
adding flash message with validation errors, and redirect to sign_up
Update README.md
Update README.md
moving vulnerability tests and adding password complexity test
Merge branch 'master' of github.com:mccabe615/railsgoat