Add github to social media links

Author: akopdev

README.md

@@ -75,11 +75,12 @@ Check [example site](exampleSite/hugo.toml) for more info.
 - Dribbble 
 - Facebook 
 - Feed     
+- Github  
 - Gplus    
 - Instagram
 - Linkedin 
 - Pinterest
 - Soundcloud
-- Vimeo    
 - Twitter        
+- Vimeo    
 - Youtube  

layouts/partials/footer.html

@@ -5,6 +5,7 @@
         <a href="https://github.com/akopdev/hugo-theme-chicago7" class="footerLink">Chicago7</a> theme
     </p>
     {{ $icons := dict
+      "github" "github.svg"
       "behance" "behance.svg"
       "dribbble" "dribbble.svg"
       "facebook" "facebook.svg"