zeromq-scala-binding: Add installation instructions for sbt users
zeromq-scala-binding: Add installation instructions for sbt users

Signed-off-by: Karim Osman <0df4ab017385e9aa3324400d725f59ea31c57132@iki.fi>

valotrading/zeromq-scala-binding,valotrading/zeromq-scala-binding