Eventstream support

We implemented a mechanism which uses inline or inband events to trigger a MPD reload. For example ad-insertion scenarios can be realized using these. An example might look as follows:
1.  The server provides a MPD  
2.  MPD reload is scheduled either by using Inline or Inband events 
3.  The new MPD contains additional periods or segments
We included a sample site to demonstrate the described behavior:
http://se-mashup.fokus.fraunhofer.de:8080/feature-event-clean/samples/ad-insertion/index.html