small fixes mostly related to docs, and readmes

Rendegraph visualizer, hardware-accelerated 2d drawing context

apply fixes for windows

new screenshot module, dynamic swapchains

image hot-reloading, abstract image loader interface, precompiled sha…

…ders

implement vulkan video decode support

[readme] update readme

[pipeline] fix uninitialised value issue

Uninitialised value would cause trouble when OR'ed with actual values.

implement gamepad support

implement dynamic adding and removing of swapchains.