Add deploy script

.circleci/deploy.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+if [ "${CIRCLE_BRANCH}" != "master" ]; then
+    echo "Only master branch can be deployed"
+    exit 0
+fi
+
+set -e
+
+DEPLOY_DIR=deploy
+
+git config --global push.default simple
+git config --global user.email $(git --no-pager show -s --format='%ae' HEAD)
+git config --global user.name $CIRCLE_USERNAME
+
+git clone -q --branch=gh-pages $CIRCLE_REPOSITORY_URL $DEPLOY_DIR
+
+cd $DEPLOY_DIR
+rm -rf *
+cp ../build/* . -r
+git add -f .
+git commit -m "Deploy build $CIRCLE_BUILD_NUM [ci skip]" || true
+git push -fs