Rename renderer to sprite-renderer as it will be part of a subsystem

Makefile

@@ -11,6 +11,7 @@ modules = \
   modules/ces/entity-manager.scm \
   modules/ces/system-manager.scm \
   modules/ces/system.scm \
+  modules/ces/system/sprite-renderer.scm \
   modules/ces/system/keyboard-reader.scm \
   modules/ces/system/tilemap-renderer.scm \
   modules/dom/canvas.scm \

game.scm

@@ -37,7 +37,7 @@
         (math vector)
         (ces entity)
         (ces system)
-        (ces system renderer)
+        (ces system sprite-renderer)
         (ces system keyboard-reader)
         (ces system tilemap-renderer)
         (ces system-manager)

modules/ces/system/sprite-renderer.scm

@@ -1,6 +1,6 @@
 ;; Renders an entity to a canvas
 
-(define-module (ces system renderer)
+(define-module (ces system sprite-renderer)
   #:pure
   #:use-module (scheme base)
   #:use-module (ces system)
@@ -35,7 +35,7 @@
   "Renders the entity to context. dt is unused."
   (render-entity context entity))
 
-(define (create-rendering-system draw-context draw!)
+(define (create-sprite-rendering-system draw-context draw!)
   "Renders an entity which has a position and sprite component to the draw context,
 and then immediately calls draw-callback. draw-callback should be a thunk, and executes
 after every entity has been processed."