Custom jsFuncName for object definitions

[amadeus]

This ES6 version of jsFuncName requires some special handling to not, by default, overwrite jsObjectKey and also not overwrite jsFuncCall.

This should fix #261

I also fixed a bug in generator syntax matching within ES6 classes.

[amadeus]

Still need to figure out some issues when using a generators asterisk, so plz do not merge yet

Ok, I think I've got it figured out. Using this snippet as a nice test case:

var ob = {
    func2(){
    },
    test1: 2 * test16(),
    math: 2 + test2(),
    something: (2 + test3()),
    test2: {},
    test3: function *test(){},
    durp: test15(),
    *func(){},
    test4: test16(),
    arr: [
        function Name(){},
        test3()
    ],

    flurp(){
    }
};


var test17 = function(){};
var test18 = function *Named(){};

function *Test18() {}
function Test19(){}