Merge 'We support rotated colliders now'

See merge request !42

README.md

@@ -148,8 +148,8 @@ The level contains a number of layers which the game-engine expects to exist:
 The `collider` layer defines static colliders for the map.  Only the following
 SVG elements may appear in this layer:
 
-- `<rect />`: A rectangle collider (**Must not be rotated, this is not yet**
-  **supported!**).  Created in Inkscape using the _Rectangle_ tool (shortcut: `R`).
+- `<rect />`: A rectangle collider (may be rotated).  Created in Inkscape using
+  the _Rectangle_ tool (shortcut: `R`).
 - `<circle />`: A circular collider.  Created in Inkscape using the _Ellipse_
   tool (shortcut: `E`).  **Careful**: Keep `CTRL` pressed while creating the
   circle, otherwise you'll get an `<ellipse />` which is not supported.