Compiling error fix in IntraPrediction.cpp when JVET_M0102_INTRA_SUBPARTITIONS is disabled

See merge request jvet/VVCSoftware_VTM!270

SW and spec mismatch related to wide angle #174

See merge request jvet/VVCSoftware_VTM!260

remove SPSNext extension and sort SPS

See merge request jvet/VVCSoftware_VTM!268

- all elements of SPSNext are moved into SPS
- syntax elements of SPS are sorted according to draft (as far as possible)
- comments were added where software and draft diverge

fix typo in tracing code

See merge request jvet/VVCSoftware_VTM!267

fix IBC indication in reshaper and hash ME

See merge request jvet/VVCSoftware_VTM!262

fix ENABLE_TRACING build

See merge request jvet/VVCSoftware_VTM!264

Keep align syntax-element variable with trace

See merge request jvet/VVCSoftware_VTM!261

- fix block statistics code for IBC mode after JVET_M0483_IBC
- enable build of block statistics code, when ENABLE_TRACING is specified on the command line

- removes old getIBCMode functions from SPSNext
- fixes references to this function in
  * reshaper
  * hash based ME

Note: SPSNext is going to be removed. Fixes can also be applied with the removal patch.

Clean up scan data arrays

See merge request jvet/VVCSoftware_VTM!257

Fix spaces and indentation in CabacReader

See merge request jvet/VVCSoftware_VTM!259

Remove outdated macros and associated code

See merge request jvet/VVCSoftware_VTM!258

Remove JEM_USE_INTRA_BOUNDARY and HEVC_USE_4x4_DSTVII

Use a single array with elements that comprise scan x position, y
position, and index into block instead of separate arrays.

Simplify array initialization code

Align ALF trace with specification

See merge request jvet/VVCSoftware_VTM!255

Cleanup CABAC contexts

See merge request jvet/VVCSoftware_VTM!253

Remove unused variables / declarations

See merge request jvet/VVCSoftware_VTM!254

Remove unused contexts and split intra mode contexts into luma and
chroma sets to align with text description

Update the software documentation/manual for VTM/JVET

See merge request jvet/VVCSoftware_VTM!252

- change README.txt to markdown (displays in GitLab)
- update build instructions
- update LaTEX document template for JVET and include it
- general updates for the software manual (authors, purpose, etc.)
- update build instructions (aligned with README)
- use code highlighting (requires Pygments installation)
- minor formatting updates

[Cosmetics] Cleanup trailing spaces

See merge request jvet/VVCSoftware_VTM!240

Fixed the bugs of Ticket #169 in IntraPrediction.cpp

See merge request jvet/VVCSoftware_VTM!251

fix for issue #171 (negative shift)

See merge request jvet/VVCSoftware_VTM!250

calculate and check shifts only when they are actually used

Cleanup: Remove unnecessary code/processing for MTS zero-out in DepQuant

See merge request !248

Fix: Prevents usage of wrong contexts in DepQuant

See merge request jvet/VVCSoftware_VTM!247

M0421 aligned with proposed draft text (btDepth -> mttDepth), issue #170

See merge request !246