Add support for Tern.js

[pmk65]

Add internal support for Tern.js

Tern is a stand-alone code-analysis engine for JavaScript. It is intended to be used with a code editor plugin to enhance the editor's support for intelligent JavaScript editing. Features provided are:

Autocompletion on variables and properties
Function argument hints
Querying the type of an expression
Finding the definition of something
Automatic refactoring

Tern is open-source (MIT license), written in JavaScript, and capable of running both on node.js and in the browser.

This would really help make Webuilder useful for working with complex JavaScript coding. (Something Webuilder currently lacks.)

[Aivars]

I think I have seen this but I'll revisit it and take a second look. Thanks!