add one more quote

git-svn-id: https://subversion.cs.illinois.edu/svn/cs225@7992 6fbd10e7-183d-0410-a318-cb416676e4f2

source/quotes.txt

@@ -70,3 +70,4 @@
 "**** ******** **** nickels!!!" ~ Chase Geigle
 "If you have a procedure with ten parameters, you probably missed some." ~ Alan J. Perlis
 "Hulp -> Wat is dit?" ~ LibreOffice Impress
+"There are 10 types of people in the world. Those who understand binary, those who don't, and those who didn't expect this joke to be in base 3." ~ Anonymous