added a simple file requester and congestiontest scenario
added new files to itec-scenario.files
contentprovider chunk 0 is always a meta packet/chunk from now on!
switched segment status to vectors rather than dynamic arrays;
adapted windowndndownloader for those changes;
adapted svcwindowdownloader slightly;
added scenario congestiontest
merge itec-scenario.files
Merge branch 'master' of github.com:danposch/itec-scenarios

Conflicts:
	itec-scenarios.files