Update CHANGELOG

(also move into new file)

Author: thejpster

CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased Changes ([Source](https://github.com/neotron-compute/neotron-pico-bios/tree/master) | [Changes](https://github.com/neotron-compute/neotron-pico-bios/compare/v0.1.0...master))
+
+* None
+
+## v0.1.0 ([Source](https://github.com/neotron-compute/neotron-pico-bios/tree/v0.1.0) | [Release](https://github.com/neotron-compute/neotron-pico-bios/release/tag/v0.1.0))
+
+* First release - it compiles, and blinks an LED.

README.md

@@ -37,9 +37,7 @@ updates) for performance reasons.
 
 ## Changelog
 
-### Unreleased Changes ([Source](https://github.com/neotron-compute/neotron-pico-bios/tree/master))
-
-* It blinks an LED.
+See [CHANGELOG.md](./CHANGELOG.md)
 
 ## Licence