add travis config

.travis.yml

@@ -0,0 +1,15 @@
+language: rust
+sudo: false
+dist: trusty
+
+# build website
+script:
+  - export PATH=$PATH:~/.cargo/bin
+  - |
+    if [[ "$TRAVIS_OS_NAME" == "linux" && "$TRAVIS_PULL_REQUEST" = "false" && "$TRAVIS_BRANCH" == "master" && "$TRAVIS_RUST_VERSION" == "stable" ]]; then
+      curl -sL https://github.com/cobalt-org/cobalt.rs/releases/download/v0.12.1/cobalt-v0.12.1-x86_64-unknown-linux-gnu.tar.gz | tar xvz -C $HOME/.cargo/bin &&
+      cobalt build && cp CNAME ./_site/ &&
+      git clone https://github.com/davisp/ghp-import.git &&
+      ./ghp-import/ghp_import.py -n -p -f -m "Documentation upload" -b master -r https://"$GH_TOKEN"@github.com/actix/actix.github.io.git" _site &&
+      echo "Uploaded documentation"
+    fi

CNAME

@@ -0,0 +1 @@
+actix.rs