Landing Page enhancement

Put login and signup into tabs on landing page and set up material-ui bootsrap
\* is a very expensive selector, as it applies to **every** html element in the page, you should consider scoping it to the html elements that really need it to [:focus](https://developer.mozilla.org/en-US/docs/Web/CSS/:focus).

https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_started/Selectors