Add Travis-CI integration for documentation.

.travis.yml

@@ -0,0 +1,37 @@
+# Build and deploy doxygen documention to GitHub Pages
+sudo: false
+
+# Blacklist
+branches:
+  only:
+    - master
+
+# Environment variables
+env:
+  global:
+    - GH_REPO_REF: github.com/DavidAntliff/ESP32-DS18B20.git
+
+# Install dependencies
+addons:
+  apt:
+    packages:
+      - doxygen
+      - doxygen-doc
+      - doxygen-latex
+      - doxygen-gui
+      - graphviz
+
+# Build the docs
+script:
+  - cd docs
+  - doxygen
+
+# Deploy using Travis-CI/GitHub Pages integration support
+deploy:
+  provider: pages
+  skip_cleanup: true
+  local_dir: $TRAVIS_BUILD_DIR/docs/html
+  github_token: $GITHUB_API_KEY
+  on:
+    branch: master
+