chore: update gradlew to v2.2
chore: update deps and vertx to latest version (v2.1.5)

Conflicts:
	gradle.properties
chore: fix `runMod` task

* add explicit dependency of vertx-hazelcast
* apply fix from https://github.com/vert-x/vertx-gradle-template/pull/31, thanks to @minus7 and @avdv.
* reformat indentation to 2 spaces
docs: update README.md

* new faq-entries
* more configuration hints
fix: always render 'index.html' in clojure example
docs: update index.html