Recreate About Us Section

Guys, I redid the About Us section - particularly by shading the background of the jumbotron to be Optimir blue, and by making white text. I additionally moved the header to the center of the page and made it black text. Let me know what you think, and if you like it, merge it. 
Let's not use IDs for our CSS styling.  It's not reusable nor maintainable.

For example, we're going to want the same styles for "About Us" as we will for "Contact Us", this should be refactored into a class  like: 
    .section-title {
        // Code here
    }

Bootstrap is actually based on this principle; you combine small atomic classes together to achieve a singular effect since they stack on top of each other.

IDs should only be used as hooks for Javascript and jQuery.

Finally, our custom CSS should be in a separate file.