Add a status icon.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

README.md

@@ -1,5 +1,11 @@
 # Akela-LEDEffects
 
+![status][st:stable]
+
+ [st:stable]: https://img.shields.io/badge/stable-✔-black.png?style=flat&colorA=44cc11&colorB=494e52
+ [st:broken]: https://img.shields.io/badge/broken-X-black.png?style=flat&colorA=e05d44&colorB=494e52
+ [st:experimental]: https://img.shields.io/badge/experimental----black.png?style=flat&colorA=dfb317&colorB=494e52
+
 The `LEDEffects` plugin provides a selection of LED effects, each of them fairly
 simple, simple enough to not need a plugin of their own. 
 

TriColor.md

@@ -1,5 +1,11 @@
 # Akela-TriColor
 
+![status][st:stable]
+
+ [st:stable]: https://img.shields.io/badge/stable-✔-black.png?style=flat&colorA=44cc11&colorB=494e52
+ [st:broken]: https://img.shields.io/badge/broken-X-black.png?style=flat&colorA=e05d44&colorB=494e52
+ [st:experimental]: https://img.shields.io/badge/experimental----black.png?style=flat&colorA=dfb317&colorB=494e52
+
 The `TriColor` effect extension is a part of
 the [`LEDEffects`][plugin:ledeffects] library, not a stand-alone base library of
 its own. It is used to implement the effects in that library.