Domain naming

Change all domains to app.exo.io
CLI naming

cctrl -> exo
cctrlapp -> exoapp
cctrluser -> exouser
NB: The command “sudo pip install cctrl” shall stay as-is.
Remove jvm guides

Conflicts:
	Guides/Java/Clojure - HelloWorld.md
	Guides/Java/Gradle - HelloWorld.md
	Guides/Java/Grails.md
	Guides/Java/Play - HelloWorld.md
	Guides/Java/Scala - HelloWorld.md
Domain and Company renaming
Remove invalid tutorial reference
Delete not unused add-ons