Merge pull request #1012 from williamstein/master

fix #1011 -- Some content on the front page is VERY dated

Author: minrk

nbviewer/frontpage.json

@@ -32,8 +32,8 @@
          "img": "/img/example-nb/python-signal.png"
        },
        {
-         "text": "O'Reilly Book",
-         "target": "/github/ptwobrussell/Mining-the-Social-Web-2nd-Edition/tree/master/ipynb",
+         "text": "Mining the Social Web",
+         "target": "/github/mikhailklassen/Mining-the-Social-Web-3rd-Edition/tree/master/notebooks",
          "img": "/img/example-nb/mining-slice.png"
        },
        {