Add crafted in intro page

Author: vctrfrnndz

views/introduction.jade

@@ -46,7 +46,8 @@ block content
 
       .social
         a.a0(href='https://auth0.com/', target='_blank')
-          img(src='/img/ico_a0_white.svg')
+          span.by-text Crafted by
+          img(src='/img/pic_logo_ft.svg', alt='Token Based Authentication')
         a.twitter(href='https://twitter.com/auth0', target="_blank")
           img(src='/img/ico_twitter.svg')