v0.4.0-beta

LCD Grid shader implemented.

* LCD Grid shader implemented.
* New control to modify the power of the scanlines amplitude. Linear gives the most round shape while higher degrees give them a more squared shape.
* Amended all the CLUT files to crush blacks and improve visibility.
* Organized the menu for less clutter. Scanlines and LCD Grid controls are now in their own submenus.
* New emergency button to turn off all the menu obstructing shaders. It's especially useful as render resolution increases.