Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

include/pokeball.h

@@ -21,7 +21,7 @@ enum
 enum {
     BALL_AFFINE_ANIM_0,
     BALL_ROTATE_RIGHT,
-    BALL_ROTATE_LEFT, 
+    BALL_ROTATE_LEFT,
     BALL_AFFINE_ANIM_3,
     BALL_AFFINE_ANIM_4
 };