General styles.
Styled race.
Styled reports.
Adjusted source sass
Updated angularFire and Firebase.
Installed angular-ui-bootstrap
Created authentication module.
Created authentication related partials.
Temporary design mockup files.
Improved persistence to handle authentication.
Improved Util with directives for navigation elements.
Reduced Authentication module dependencies.
Major changes to Karma module and sub-modules.
Images and minor home temporary changes.
Karma related partials.
Updated index to use new modules.
Merge branch 'develop' of https://github.com/TallerWebSolutions/team-karma into develop