Implementing Login Panel

- Implemented CSS and HTML for Login panel.
Login Panel Updates

Minor restyling tweak.
Implementing Account Creation Panel

- Added hidden form to login panel for account creation
- Few minor styling tweaks
Adding Active User Content

- Increased min size of dropdown component to 200px
- Added mockup for header navigation for logged in users
- Added mock user profile image.
Merge pull request #1 from lopezton/master

Implementing Login and Account Creation Forms