Audio OSC - OSC support

ags_osc_buffer_util
ags_osc_util
AgsOscBuilder — OSC buidler
AgsOscParser — the OSC parser
AgsOscClient — the OSC client
AgsOscServer — the OSC server
AgsOscConnection — the OSC server side connection
AgsOscResponse — the OSC server side response
OSC controllers

OSC controllers

Every request is passed through the front controller. It delegates the request to the requested controller. Each controller has its own context path to match.