This node reads MM data from a URL, specified by an event.


It can receive the following events:

* [set & get] url(string) :
  specifies the url of the MM data to be read.
  Can be send in: CONSTRUCTED
  Must been sent: CONSTRUCTED


It emits the following events:

* [instream & toapp] start_track(string) :
  signals the beginning of the data, (string) containing the name of
  the MM data (provided by url or the MM data itself).

* [instream & toapp] end_track(string) :
  signals the end of the data, (string) containing the name of
  the MM data (provided by url or the MM data itself).

* [instream & toapp] finished(bool) :
  signals the last message of this node before it stops itself after
  reaching the end of the MM data.
