FIX: Removed window display scale from zoom calculation

Many thanks to @selimanac for this release!

• Shaders
  • lowres and sps shaders updated for the new pipeline.
• lowrezjam.script
  • Display scale label added
• game.project
  • test.appmanifest added for testing shaders with both OpenGL and Vulkan
• coords.lua
  • get_zoom() made public to be used in the render script instead of calculating it separately.
  • window.get_display_scale() added to zoom calculation. Note: I don’t have a Retina device, this should be tested.
• lowrez.render_script
  • Refactor
  • Replaced deprecated render and sys.get_config functions to new ones
  • Updated to use the new graphics API
  • Removed unnecessary calls to render.get_window_width() and render.get_window_height()
  • Frustum culling added to all draw calls

FIX: GUI blend mode was disabled too early. Thanks @roketstorm

NEW: Helper to translate GUI coordinates for picking GUI nodes (see example)
NEW: Added set_scale_snap message
CHANGE: Renamed some folders

FIX: Updated path to quad.dae

FIX: Updated render script to updated render.draw() function signature.

CHANGE: The render script now accepts not only the view but also the projection from an active camera

NEW: Added preset templates for Lowrez jam and Nokia 3310 jam

NEW: It is now possible to adjust low-res texture size
NEW: Merged upscale material and other settings

FIX: Didn't set the right blend state in the render script