Add motiviation + goals

README.md

@@ -48,6 +48,21 @@ fn setup(mut commands: Commands) {
 }
 ```
 
+## Motiviation
+
+When I first started experimenting with Bevy, the lack of a first party 2d
+lighting implementation left me wanting. While there were some rather impressive
+experimental 2d lighting crates out there, there wasn't much in the way
+of drop in options available.
+
+My goal with this crate is to fill that void, prioritizing ease of use and
+general application over depth of features.
+
+## Future goals
+
+- Light occluders + shadows
+- Sprite lights
+
 ## Bevy compatibility
 
 | bevy | bevy_light_2d |