macroized nal read/write; handle just about all cases where reading and writing needs unique code, except for sei stuff; disable sei for now; fix scaling list handling
macroized nal read/write; handle just about all cases where reading and writing needs unique code, except for sei stuff; disable sei for now; fix scaling list handling

git-svn-id: 7cbbca2412464347adb5e4bdc42efeec62dad2f5@91 bc2f0a9b-661e-0410-ac89-ff65b7b8b7c4

aizvorski/h264bitstream,sjtu-mc/h264bitstream,krieger-od/h264bitstream,aizvorski/h264bitstream,sjtu-mc/h264bitstream,aizvorski/h264bitstream,krieger-od/h264bitstream,sjtu-mc/h264bitstream