reworded sprite animation requirement (closes #13)

index.html

@@ -254,7 +254,7 @@
 
     <p id="req-pic-manipulation" class=req>It MUST be possible to programmatically manipulate a picture so as to crop it, apply filters to it, etc. and save the result of these manipulations. This MUST NOT interrupt the ability of the user to interact with the application.</p>
 
-    <p id="req-framerate" class=req>It MUST be possible to smoothly draw multiple animated sprites in full screen mode (e.g. at 30fps).</p>
+    <p id="req-framerate" class=req>It MUST be possible for the user agent to efficiently manage animation timing through, for example, hardware accelaration and/or synchronization with the refresh rate of the display.</p>
 
     <p id="req-audio-playback" class=req>It MUST be possible to play Multiple sound files simultaneously with minimal latency.</p>