Fix missing documentation for many clock faces:

* Move from .c to .h as needed for consistency.
* When missing from both, copy from pull request or wiki.
* When missing entirely, infer functionality from source code.

movement/watch_faces/complication/invaders_face.h

@@ -25,8 +25,6 @@
 #ifndef INVADERS_FACE_H_
 #define INVADERS_FACE_H_
 
-#include "movement.h"
-
 /*
  * Remake of the "famous" Casio Number Invaders Game
  *
@@ -60,6 +58,8 @@
  * 
  */
 
+#include "movement.h"
+
 typedef struct {
     uint16_t highscore;
     bool sound_on;