First implementation of simulcast, adds VP8 simulcast to video engine.

Changed API to RTP module
Expanded Auto test with a test for simulcast
Made the video codec tests compile
Added the vp8_simulcast files to this cl
Added missing auto test file
Review URL: http://webrtc-codereview.appspot.com/188001

git-svn-id: http://webrtc.googlecode.com/svn/trunk@736 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/test/normal_test.h

@@ -34,7 +34,7 @@ public:
                            const WebRtc_UWord8* payloadData,
                            const WebRtc_UWord32 payloadSize,
                            const webrtc::RTPFragmentationHeader& fragmentationHeader,
-                           const webrtc::RTPVideoTypeHeader* videoTypeHdr);
+                           const webrtc::RTPVideoHeader* videoHdr);
 
     // Register exisitng VCM. Currently - encode and decode with the same vcm module.
     void RegisterReceiverVCM(webrtc::VideoCodingModule *vcm);