Update message.rb

Fixed an issue that caused the Regex pattern to incorrectly parse Numerics such as this: 

:pinkiepie.ponychat.net 333 Jayden1 #test Caerdwyn!Tia@silhouetted.against.the.night.sky 1377275085

The "Numeric" group would match the first 3 digits of the Epoch seconds at the end of the line.