Document updated

Fix to signal bitrate and CPB size in HRD parameters
Fix to make sure the PT SEI is generated for every picture

store sub-picture numbers, sizes, and locations with a picture, so that they can be fetched directly from redPic

2. fix the wrong variables initialization in EncRCGOP::create()

   - Move wrap around offset from SPS to PPS.
   - Disable wrap around for any reference pictures that require RPR scaling.

JVET-R0059 aspect 2: Skip the signalling of the ltrp_in_header_flag[ listIdx ][ rplsIdx ] syntax element when the syntax strucure is directly included in the PH or SH instead of in the SPS