Upgrade using C9 Tern for ideas

[Sevin777]

https://github.com/c9/c9.ide.language.javascript.tern

https://github.com/c9/c9.ide.language.jsonalyzer

See get call position function:

function getCallNode(currentNode, cursorPos) {
    var result;
    currentNode.traverseUp(
        'Call(e, args)', 'New(e, args)', function(b, node) {
            result = node;
            return node;
        },
        function(node) {
            // Show tooltip only on first line if call spans multiple lines
            var pos = node.getPos();
            if (pos && pos.sl !== cursorPos.row)
                return node;
        }
    );
    return result;
}