Added jazzy docs to travis

Author: Philip Niedertscheider

.travis.yml

@@ -13,6 +13,7 @@ env:
 stages:
   - Tests
   - Examples
+  - Documentation
 
 jobs:
   include:
@@ -125,3 +126,24 @@ jobs:
                  -configuration Debug
                  ONLY_ACTIVE_ARCH=YES
                  test | bundle exec xcpretty
+
+  - stage: Documentation
+    name: Generate Documentation
+    language: objective-c
+    git.depth: false
+    if: branch = master
+    cache:
+      bundler: true
+    install:
+    - bundle install
+    script:
+    - git remote update
+    - git fetch origin gh-pages:gh-pages --depth 1
+    - git checkout gh-pages
+    - bundle exec jazzy
+    - git add docs
+    - git config user.name  "Travis"
+    - git config user.email "[email protected]"
+    - git commit -m "Updated docs for $TRAVIS_TAG"
+    - git remote add secure-origin https://${GITHUB_TOKEN}@github.com/$TRAVIS_REPO_SLUG.git
+    - git push secure-origin gh-pages