Added travis config and doc url

.travis.yml

@@ -0,0 +1,13 @@
+language: rust
+after_success: |
+  [ $TRAVIS_BRANCH = master ] &&
+  [ $TRAVIS_PULL_REQUEST = false ] &&
+  cargo doc &&
+  echo '<meta http-equiv=refresh content=0;url=yup-oauth2/index.html>' > target/doc/index.html &&
+  git shortlog -s -n | cut -c 8- > target/doc/humans.txt &&
+  sudo pip install ghp-import &&
+  ghp-import -n target/doc &&
+  git push -fq https://${TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
+env:
+  global:
+    secure: R2TjgAkb9vgibslocKKMQ1fterul/nJJ/Srv8mxbzA/z569ZKFeR8gFlM0bxUkQVeJpGkHKkR6dcNuk6xtafRkm2W5Q04FUqF7/eEzvzMpf0a1kPOld44dZgYbncmk3bend40+fOwDpubozTtuLoimDIIxqdNp39d7w5h0a+s1U=

Cargo.toml

@@ -7,6 +7,7 @@ repository = "https://github.com/Byron/yup/lib/oauth2"
 description = """A partial oauth2 implementation, providing the 'device' authorization flow.
 More information about how it's done can be found here: https://developers.google.com/youtube/v3/guides/authentication#devices
 """
+documentation = "http://byron.github.io/yup-oauth2"
 
 [dependencies]
 chrono = "*"