Changes between 3.1.2 and 3.2.0

• tools.Nick class added for RFC-compliant nickname comparison and storage
• Returning willie.NOLIMIT from a callable ignores the rate limit for that
  call
• get_list() added to ConfigSection. Will reliably return a list from a
  config attribute.
• A number of bugs regarding admin and operator lists were fixed
• Unusual mode changes no longer cause errors
• Times shown by .t, .in, etc. all now use formats set by .settimeformat
• sed feature can use backslashed slashes in substitutions
• Weather module was rewritten, and now uses Yahoo! Weather
• Numerous stability and usability fixes