fixes:
- readBits not working as expected
- no keyframes
- mdat->end set too early
changes:
- moved the buffer layer to the file class -> >10x faster
- forbidden bit == 1 inidicates the payload is malformed, not the header
- removed dependency on internal libavcodec code (added sps-decoder)
- splitted classes in seperated files
- class members names now use suffix '_'
- build instructions
added:
- regulation of log messages (-v -vv -q)
- default output now usefull for average user
