Add sdpfile retrieval and manipulation features
Peerstreamer-ng can retrieve an sdp file through http, modify it according to the local streamer and serve it again through http for its clients
add HTTP POST method to create streamer structures
add also the tokens module for string tokenization
add HTTP method "GET /channels.json"
it returns the list of channels registered in the application (JSON format)
Add ReST URL routerAdd the task manager module, handling multiple concurrent periodic functions listeing for active file descriptors