max level in the DPS shall not be less than the highest level in an SPS

Change the checking for missing pictures to check only active reference picture, not all pictures in the RPS

1. All pictures in an AU shall have the same value of TemporalId.
2. The TemporalId of an SEI NAL unit shall be equal to the TemporalId of the AU containing the NAL unit.
3. The nuh_layer_id of a filler data NAL unit shall be equal to the nuh_layer_id of associated VCL NAL unit.

- don't use SPS in PPS parsing/writing
- create a function for decoder parameter set consistency checks
- fix bug with JVET-Q0413 subpicture parsing changes
- may contain traces of coding style fixes

Bug fix for loop filter initialization when min CU size is not 4; changed intra chroma minQT size in software to luma unit

Move decoder check of same chroma format and same bit-depth from DecLib::xDecodeSPS to DecLib::xActivateParameterSets

Implementation of JVET-Q0468 support of min Luma coding block size, and JVET-Q0469 for Intra Chroma Min QT bug fix

Modified SAO for 12 bit coding.
Also removed SAO offset from the HEVC RExt PPS extension.
The HEVC RExt PPS extension and the associated
cross-component-prediction should be removed in the future