Multiple mode changes in one MODE message #93

Altered the MODE message handler to correctly handle multiple mode
changes in one MODE message. It should now corectly display 3 messages
for "MODE #zoo +vo-o Ape Elephant Ape" and still display 1 message for
"MODE #zoo +v Ape". As mentioned in issue #93.
Merge pull request #325 from Sumurai8/master

Multiple mode changes in one MODE message, fixes #93