Add .travis.yml
Initial phpunit
Return JSON for Ajax Request
Update php-u2flib-server
Clean up admin.js
Add TODO for future enhancement
Minified JS by http://closure-compiler.appspot.com/
Minified CSS by http://gpbmike.github.io/refresh-sf/
Use minified files
Localize Time
Show message on U2F-unsupported browsers
Add assets to login screen
Verify credentials before TFA