Installation instructions could be clearer

[jbeck111]

I understand nbscala can be installed through Netbeans IDE plugins menu, however, there is no plugin with this name. A search of "nbscala" within the plugin installer, brings up 22 plugins, none of which has the name nbscala (but they all refer to your github page). If the user needs to select all of these plugins, perhaps the user should be told this, in the readme. Or, ideally, can you make an "nbscala" plugin that will install all of the others?