Moved unicode2ragel.rb to the contrib directory.

git-svn-id: http://svn.complang.org/ragel/trunk@878 052ea7fc-9027-0410-9066-f65837a77df0

diff --git a/examples/unicode2ragel.rb b/contrib/unicode2ragel.rb
similarity index 100%
rename from examples/unicode2ragel.rb
rename to contrib/unicode2ragel.rb