Test version 0.0.2

A test update of the Khel: Game Engine alpha version 0.0.2.

This version has included some upgrades like better, drag-drop in Scenegraph Explorer.

Dockable windows:- You can dock app windows now, it makes the user interface look much better.

Prefab, Texture, and Loaded textures windows have been added with some sample prefabs and textures.

A few elements have been removed but are likely to be added in future versions again, for example, the eye icon for quickly hiding a node in scenegraph has been removed for now.

A toolbar for the creation of some basic scene nodes has been added with its modal windows for the creation of different nodes.

Most of the items are still placeholder, as the engine is still in the test phase only where I am trying out stuff if it works or not.

Let me know about the performance or any major issues that you face using it.

Editor Camera is still a basic one, you can Zoom in and out using the mouse Right button, and Rotate with the mouse Left button, and use both the mouse button to Pan in the scene.