maintenance

• if the new nrepl is available start the server with it
• only load nREPL dep if an :nrepl-port has been specified
• remove single segment ns in namespace forms forms
• allow :npm-deps to be true as well as false
• added better error checking for missing ring handler
• Clojure version comparison logic fix
• change client side logging of a compile exception to a console.warning to support React Native better