Use Bootstrap default class instead of custom one

src/public/components/about.js

@@ -11,7 +11,7 @@ var About = React.createClass({
         return (
             <div>
                 <h2>About</h2>
-                <p className="bg-info text-info">
+                <p className="alert alert-info">
                     <strong>DAVIDS</strong> stands for DuplicAtes VIewer and Detector for Spotify.
                 </p>
                 <p>

src/public/style.css

@@ -12,11 +12,6 @@
     max-height: 50px;
 }
 
-.bg-info {
-    padding: 1em;
-    border-radius: 1ex;
-}
-
 html {
     position: relative;
     min-height: 100%;