Added baseview(extended from backbone view), which can further extended ...

...by other views

STUD-823
@adampalay
@cahrens

Extend views from BaseView instead of Backbone.View.

Sample for extending other views from this baseview:

```JavaScript
define(["backbone", "underscore", "js/views/baseview"],
    function(Backbone, _, BaseView) {

    var AbcView = BaseView.extend({
    )};
    return AbcView;
)};
```