Validate that login field and password are not empty on authentication
Update to docs for authentication #72 #74
Tweaking code a little bit.

Signed-off-by: Ben Corlett <bencorlett@me.com>
Adding tests for latest authentication changes.

Signed-off-by: Ben Corlett <bencorlett@me.com>
Merge branch 'master' of github.com:cartalyst/sentry