add travis stuff for deploying to Github pages

.travis.yml

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+script: bash ./deploy.sh
+language: node_js
+node_js:
+- '5.0'
+env:
+  global:
+  - GH_REF: github.com/koodiklinikka/koodiklinikka.fi.git
+  - secure: "SdxYBRMcnZgohaudCwojqmLcUjwrwoxdNuW1u2pHuYCh6/KXhnl8wvKbqCur5nY1y2o6XH4oiqUX6fauyn5MKrqRjE0iEGAioSRqs5yIRGCk0nIN7H37JknH5knbQBix5PI2lyzAoogWlcSNIwwYeBem5L/fEvgKSLqQ6XMry5k="

deploy.sh

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+#!/bin/bash
+set -e # exit with nonzero exit code if anything fails
+
+# clear and re-create the public directory
+rm -rf public || exit 0;
+mkdir public;
+
+# run our compile script, discussed above
+npm run build
+
+# go to the public directory and create a *new* Git repo
+cd public
+git init
+
+# inside this git repo we'll pretend to be a new user
+git config user.name "Travis CI"
+git config user.email "riku.rouvila@gmail.com"
+
+# The first and only commit to this new Git repo contains all the
+# files present with the commit message "Deploy to GitHub Pages".
+git add .
+git commit -m "Deploy to GitHub Pages"
+
+# Force push from the current repo's master branch to the remote
+# repo's gh-pages branch. (All previous history on the gh-pages branch
+# will be lost, since we are overwriting it.) We redirect any output to
+# /dev/null to hide any sensitive credential data that might otherwise be exposed.
+git push --force --quiet "https://${GH_TOKEN}@${GH_REF}" master:gh-pages > /dev/null 2>&1