JVET-S0066: gci_three_minus_max_log2_ctu_size_constraint_idc and gci_no_luma_transform_size_64_constraint_flag

Also fixes #738

VUI modifications including VUI length, moving two flags from GCI to
VUI, reordering VUI variables to follow syntax elements

Renumbering level according to major*16+minor*3, with maximum level now
15.5 (not 8.3).

Karsten Suehring authored 4 years ago and Frank Bossen committed 4 years ago

- also disable decoder conformance checks that fail for multi-layer streams apparently without valid reason
- rename Picture::layer to temporalId, because temporal ID is stored in this member variable

Document updated

Fix parsing dependencies in the VUI syntax by moving the
general_progressive_source_flag and general_interlaced_source_flag to
the VUI

- converts static arrays to vectors for subpicture related parameters
- improved encoder parameter checking
- mode automatic calculation of subpicture ID length at encoder
- update theoretical limit of maximum number of subpictures

- initialize slice map from subpicture map
- encoder support for inferring slice map from subpicture map
- improve software manual

- new pattern: create a class to collect all parameters  related to this SEI
- existing code can be refactored to use the same pattern for grouping to avoid endless assignments

Note: fixes executable flags for some unrelated config files