SEO meta tags added

Author: afonsopacifer

site/index.html

@@ -11,19 +11,24 @@
 		<link rel="stylesheet" href="assets/css/style.css">
 		<link href='http://fonts.googleapis.com/css?family=Open+Sans:400,800,700' rel='stylesheet' type='text/css'>
 
+		<!-- Meta SEO -->
+		<meta name="description" content="A grid based in Flexbox and Stylus">
+		<meta name="keywords" content="flexbox,grid,framework,css,gridsystem,stylus">
+		<meta name="robots" content="index,follow">
+
 		<!-- twitter card -->
 		<meta name="twitter:card" content="summary">
 		<meta name="twitter:site" content="@afonsopacifer">
 		<meta name="twitter:title" content="Flex Grid Framework">
 		<meta name="twitter:description" content="A grid based in Flexbox and Stylus">
-		<meta name="twitter:image" content="assets/img/logo.jpg">
+		<meta name="twitter:image" content="https://afonsopacifer.github.io/flex-grid-framework/assets/img/logo.jpg">
 
 		<!-- Facebook Open Graph -->
 		<meta property="og:type" content="website">
 		<meta property="og:title" content="Flex Grid Framework">
 		<meta property="og:description" content="A grid based in Flexbox and Stylus">
 		<meta property="og:url" content="https://afonsopacifer.github.io/flex-grid-framework/">
-		<meta property="og:image" content="assets/img/logo.jpg">
+		<meta property="og:image" content="https://afonsopacifer.github.io/flex-grid-framework/assets/img/logo.jpg">
 
 	</head>