- 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

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 jvet/VVCSoftware_VTM!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 jvet/VVCSoftware_VTM!246

The integration of JVET_M0297_32PT_MTS_ZERO_OUT adds unnecessary code as
well as unnecessary processing in the encoder quantization process. -
The suggested change simplifies the code and avoids unnecessary
processing for the zero-out region.

The suggested changes fix the following two issues:

[1]
For blocks with width>32 or height>32, the scan created in initRom()
(file Rom.cpp) are only valid for the non-zero-out region. However, in
Rom::xInitScanArrays() (file DepQuant.cpp), the zero-out region is also
used. This has the effect that the array raster2id[] contains wrong
values. As a consequence, wrong neighboring positions cpos[] are derived.

Even though a previous fix (fix #161) ensures that the positions are
clipped to a value inside the subblock, these positions could still be
wrong. It is suggested to fix the issue by correctly considering the
zero-out regions for larger blocks (which is the actual source of the problem).

[2]
In State::updateStateEOS(..), the array m_absLevelAndCtxInit should be
set equal to zero if a skipped subblock is selected. Otherwise, it could
be possible lead to a usage of wrongs contexts for following transform
coefficients.

In Rom::xInitScanArrays()

Fix ticket#166 on the context derivation of IBC flag

See merge request jvet/VVCSoftware_VTM!245

Minor code improvement on JVET_M0055_DEBUG_CTU

See merge request jvet/VVCSoftware_VTM!244

JVET-M0055 DebugCTU and bug fix for #163

See merge request jvet/VVCSoftware_VTM!193

Jenkins CI: fix build rules

See merge request jvet/VVCSoftware_VTM!243

change new build rule to be specific for Linux-build only
use usual parameters for enabling trace

Fix #155: Don't set GBiIdx too early

See merge request !239

Adapt the fix for uninitialized memory access with REUSE_CU_RESULTS

See merge request jvet/VVCSoftware_VTM!236

Fix decoder analyser

See merge request jvet/VVCSoftware_VTM!242

Jenkins CI: option for selective trace file build

See merge request jvet/VVCSoftware_VTM!241

Decoder analyser did not work. This corrects the problem, removes unused
entries and corrects the orders of strings vs enum list.

adds an option to the Makefile to allow selected platform build
with trace option enabled when run in Jenkins

Fix trace (missing underscore)

See merge request jvet/VVCSoftware_VTM!238

# Conflicts:
#   source/Lib/DecoderLib/VLCReader.cpp
#   source/Lib/EncoderLib/VLCWriter.cpp

Align syntax element trace with specification

See merge request jvet/VVCSoftware_VTM!237