Fixed some errors when no nodes were present in the tree.

Add a section to describe moving the font files into your own project.

Possibly fixed nine_patch.

Update: startup resources are now plugin settings

ImageSettings was removed from Bevy, startup settings are now plugin settings not resources. These changes allow the example code to compile with the recommended(required) versions of Bevy.

See: https://github.com/bevyengine/bevy/commit/5622d56be1262fce8a2d458f2b78abf1cab3ab50

Readme changes.

Rewrite

Updated Typo in README.md

Pad shader structs to 16 bytes

Enable uuid dependency wasm support

Update bevy version in readme.

Work on fixing CI.