enabling travis builds

.travis.yml

@@ -1,22 +1,31 @@
 language: node_js
     - "8.9.0"
-
+    
 install:
     - npm install -g gitbook-cli
     - gitbook install
     - sudo -v && wget -nv -O- https://download.calibre-ebook.com/linux-installer.py | sudo python -c "import sys; main=lambda:sys.stderr.write('Download failed\n'); exec(sys.stdin.read()); main()"
 
 script: 
-    - gitbook build
-    - gitbook pdf ./ _book/teiid-documents.pdf
+    - gitbook build ./ content
+    - gitbook pdf ./ teiid-documents.pdf
 
 after_success: |
     if [ -n "$GITHUB_API_KEY" ]; then
-    git checkout --orphan gh-pages
+    git checkout --orphan $TRAVIS_BRANCH-gh-pages
     git rm -rf .
-    rm -rf $TRAVIS_BRANCH
-    mv _book $TRAVIS_BRANCH
-    git add -f --ignore-errors --all $TRAVIS_BRANCH
+    git add -f --ignore-errors --all content teiid-documents.pdf
     git -c user.name='travis' -c user.email='travis' commit -m 'ci publishing'
-    git push -f -q https://$GITHUB_USER:$GITHUB_API_KEY@github.com/$TRAVIS_REPO_SLUG gh-pages
+    git push -f -q https://$GITHUB_USER:$GITHUB_API_KEY@github.com/$TRAVIS_REPO_SLUG $TRAVIS_BRANCH-gh-pages
+    git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*" 1>/dev/null
+    git fetch origin gh-pages
+    git checkout gh-pages
+    if [ ! -d "$TRAVIS_BRANCH" ]; then
+    git submodule add -b $TRAVIS_BRANCH-gh-pages https://github.com/$TRAVIS_REPO_SLUG $TRAVIS_BRANCH
+    git -c user.name='travis' -c user.email='travis' commit -am "adding submodule"
+    git push -q https://$GITHUB_USER:$GITHUB_API_KEY@github.com/$TRAVIS_REPO_SLUG gh-pages
+    fi
+    git submodule update --remote
+    git -c user.name='travis' -c user.email='travis' commit -am "updating submodules"
+    git push -q https://$GITHUB_USER:$GITHUB_API_KEY@github.com/$TRAVIS_REPO_SLUG gh-pages
     fi