WIP - Transition graphics backend from vulkano to wgpu

The main change is the removal of a lot of vulkan related build
instructions on macOS and window...

This makes the capture examples synchronous with the main thread in
order to avoid users' machin...

New demo showing how to use the values in envelopes at the playhead

This allows for specifying the window size of a sketch without having to
set the size within the...

Previously a validation error was occurring due to passing a sampled
texture to the bind group w...

This should avoid some confusion where users might wonder why their aync
reads/writes aren't hap...

Also removes the remaining vulkan examples. We can always refer to these
from previous commits w...

This adds a suite of functionality for efficiently mapping texture data
and reading it from the ...

This allows the user to ensure that the command buffer responsible for
drawing to the swap chain...

This is useful for copying the swap chain texture for example.

Fix wgpu swapchain texture life time

This adds the `wgpu::texture::image` module, along with new constructors
on `Texture` and `Textu...

Fix some panics in the optimization passes

This replaces the old vk_compute_shader example with a demonstration
that should be quite a bit ...

This fixes an edge-case of the optimization pass that was
panicking with "expected a strongly co...

[nannou-new] Fix build with 2018 edition

Also updates the dependencies and related code.

Defaulting the `wpgu::PowerPreference` to `HighPerformance` makes
things fly on the macbook pro ...

Also implements the scale factor changed event.

Also adds methods for accessing the primary and available monitors to
the **App**.

This fixes a crash I was running into in on Linux with Intel HD620.

Currently I'm getting some "GPU got stuck" errors which cause the window
to lock-up for a few se...

This restructures management of wgpu adapters, devices and queues so
that devices and their queu...

Also re-exports the `wgpu` crate's `Texture` type as `TextureHandle`.

The new `Texture` type ac...

Still need to enable the depth buffer and test with 3D.

Fixes drawing behaviour when the window is resized.

The `simple_ui.rs` and `named_color_reference.rs` examples have been
tweaked slightly to allow f...

This PR is an overhaul of the graphics backend used throughout nannou.

See #446, #374, #408 for...

Rename window build methods

Fix links on backers and sponsors badges in README

This patch renames window builder method with_multitouch to multitouch.

This patch renames window builder method with_decorations to decorations.

This patch renames window builder method with_transparency to transparency.

This patch renames window builder method with_visibility to visibility

This patch renames window builder method with_maximized to maximized.

This patch renames window builder method with_fullscreen to fullscreen.

This patch renames window builder method with_max_dimensions to max_dimensions.

This patch renames window builder method with_min_dimensions to min_dimensions

This patch renames window builder method with_dimensions to dimensions.

This patch renames window builder method with_title to title.

Add XCB-dev packages

Fix for https://github.com/nannou-org/nannou/issues/442

added Gentoo vulkan information

Add an explanation of how run additional examples

cpal 0.10 -> 0.11

Update dependencies

Went smoothly. No need for code changes.

cgmath crate publishes three traits from approx 0.3 crate (AbsDiff,
RelativeEq, UlpsEq) which ar...

Adding rgb8 to represent values with bytes

Adding grayscale values in Colors

Changing all examples to support the new function

Update to nannou 0.12. Publish version 0.2.