fix(index): use https for fonts

Author: Splaktar

app/index.html

@@ -7,7 +7,7 @@
  <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
 
  <title>AngularJS Material - Starter App</title>
- <link rel='stylesheet' href='http://fonts.googleapis.com/css?family=Roboto:400,700'>
+ <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Roboto:400,700'>
  <link rel="stylesheet" href="./jspm_packages/github/angular/bower-material@master/angular-material.css"/>
  <link rel="stylesheet" href="./assets/app.css"/>
 </head>