Add christmas edition

christmas/text_generator/README.md

@@ -0,0 +1,15 @@
+# Sprite generator
+
+## Install
+
+- Install Python 3.5 or later
+- Execute `pip install -r requirements.txt`
+
+## Use
+
+- Using [Piskel](https://www.piskelapp.com/)
+  - draw the sprites
+  - export them in `zip` format (it's a .zip containing .png files)
+- Place the files inside the [spritesheets](spritesheets) folder
+- Execute `python main.py`
+- The output is automatically placed in the [output](output) folder