[css-egg] Add proposed alternate definitions of the timble

Author: frivoal

css-egg/Overview.bs

@@ -324,6 +324,14 @@ Alternatively, defining ''1tmbl'' as
 the speed at which Tim Berners-Lee speaks in that language
 is also problematic,
 given that there are languages that He does not speak at all.
+Tim Berners-Lee has provided an alternative definition of the timble,
+<a href="http://schepers.cc/timble">as documented by Doug Schepers</a>:
+<q>speech at more than 1 timble is difficult to understand;
+speech below 1 timble is simply boring</q>.
+Doug himself defines it as
+<q>the uppermost rate of speech
+at which a normal person
+can understand what’s being said in their native language</q>.
 
 <h4 id="voice-rate-ext">
 Extension to the 'voice-rate' property</h4>
@@ -393,7 +401,9 @@ Thanks especially to the following people for their ideas, feedback, and experim
 Anne van Kesteren,
 Bruce Lawson,
 Chris Mills,
+Doug Schepers,
 Daniel Glazman,
 Leif Arne Storset,
 Paul Verbeek,
-Peter Linss.
+Peter Linss,
+Tim Berners-Lee (assuming the quotation by Doug correctly records what Tim said).