Updated About Us and Terms of Service Page

The content on About Us is suggested by me but is still open for suggestions. 

Also updated terms of service page.

Would like to bug @yangshun to help me review as well - thanks!
You are not making use of scss. The purpose of SCSS is to make CSS easier to write, and they come with the selector nesting feature. You could have done:
```
.about_quote {
    background-color: #f2f2f2;
    h1 {
        ...
    }
    p {
        ...
    }
}
```