add new methods

try make it possible to decode #bundle message.
align decodeOSC with pyOSC's method

since I think this was modified from pyOSC
little clean-ups

i want to pee
- - -
now it accept bundle!
support #bundle

final clean up
Merge pull request #2 from fillmember/Add-new-methods-in-OSC-class

Support #Bundle message!