Fixed UnicodeDecode exceptions in Python < 3
Fixed UnicodeDecode exceptions in Python < 3

Closes #108 Error occurred when receiving emoticons
Closes #100 Fix UnicodeDecodeError
Closes #98 UnicodeDecodeError for non Latin1 messages

ongair/yowsup,jperelli/yowsup,biji/yowsup,shibumi/yowsup