Added deploy script for gh-pages, I am not sure if it works. #23

.travis.yml

@@ -6,4 +6,8 @@ rust:
 matrix:
   allow_failure:
   - rust: nightly
-# after_sucess: build a demo book an push to gh-pages branch
+env:
+  global:
+    secure: l3/qEC4krRerllLQzni8j5AjngFi6pluWvBWj//1mJLoIEYwxlQ9mYxEdd9BqccWWFn3K0bVYCVC/64+tP6sRfLkZCe2gPUtwe7ITwCDbapUxmkiRObVJCs5yMQZt6idyhHUDKAXKgNCrusfI2BM3tKGBfRK7Cnn/R/7p/U9+q7D1sgJtUKp6ypVzK6A3jLNp3dFLFI19a5KmbZMVsaa7tOhtdDJjjr7ebsc9z7HMW5/OItiWU3FSauVQQlUMaCiEgFuIG7H7OnBAYWB/gNEtLuwfLqU9UjtWk/njNNRnmJ7m3y5HbQhv5H5F5mJUOq9XFlPLwPwyTeVztSGdQm6k8Pp2pgKBUjY27afBl9BWU+msmN6k0oXfhvIebiBPe/x2udiKeFik1xqOOEU1q9dF0sZiuPxCSM1n7tgWklJ8epgaRQaMPPQw9pO/2H5/ynHCJqBlw6WcdiqWtwAyyr/GEx62u/cg5IVkqb7KLmYsWzjS8wYG4CYs1eIxCw2xPZxP0FGuUXvxTBUPipFze6Z7FqxVauXtVe2D7c1P4738HZP660rmR0GYtHtKLny1QxCCK9sxd9JmcezFCSz4YeQ1od9xc0OzGJ2ullKNGizmGfYmgL6X8faNylLIEdaiHAcY16xV3L0g3fXL1Qg360UHQyj7GIv+0nqQnf+H9xRTTU=
+after_success:
+  - test $TRAVIS_PULL_REQUEST == "false" && test $TRAVIS_BRANCH == "master" && bash deploy.sh

deploy.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -o errexit -o nounset
+
+rev=$(git rev-parse --short HEAD)
+
+cd book-example/book
+
+git init
+git config user.name "Mathieu David"
+git config user.email "mathieudavid@mathieudavid.org"
+
+git remote add upstream "https://$GH_TOKEN@github.com/azerupi/mdBook.git"
+git fetch upstream
+git reset upstream/gh-pages
+
+touch .
+
+git add -A .
+git commit -m "rebuild pages at ${rev}"
+git push -q upstream HEAD:gh-pages