Create HAML smoketest control page

Default route if logged in is to smoketest control page
Default route if not logged in is to index for login
Clean up interface

Automatically redirected to '/test' on login
Added 'Logged in as #{username}' to layout
Added logout link to layout
Added redirect link on login error screen
Add server output option to smoketest

Output is rudimentary and is chunked instead of live-streaming.
This is a transitional state, not a stable endpoint.
Jerry-rig Thin streaming smoketest session