correct CHECKs for field coding in VideoIOYuv

See merge request !945

Both fields are required to have the same dimensions for being combined into one picture again. The checks fail, if the dimensions are the same, so they need to be inverted.

JVET-N0494: Dependent RAP indication SEI message

See merge request jvet/VVCSoftware_VTM!930

JVET_O0179 : Update SEIRemovalApp and StreamMergeApp with the new nal unit syntax

See merge request !943

Revert "Merge branch 'JVET_O1164_RPR' into 'master'"

See merge request !944

This reverts merge request !915

RPR fix for affine and half pel AMVR

See merge request !915

fix for JVET-N0353: initialize picture timing only, if buffering period is available

See merge request !941

fix#527: Performance of IBDI = 12 is worse than IBDI = 10 on top of VTM-6

See merge request !942

Fix #522: allow APS activation on all slices

See merge request jvet/VVCSoftware_VTM!934

Fix#526: Max tiles in rectangular slice

See merge request !937

add VS2019/cmake and LaTeX files to .gitignore

See merge request !939

Remove EMULATION_PREVENTION_FIX macro

See merge request !940

The fix was confirmed as part of the specification.

JVET-O0179 : Nal unit syntax

See merge request !933

Wave front bug-fix and comment-fix

See merge request !938

JVET-O0178 : conditionally signal sps_sub_layer_ordering_info_present_flag

See merge request !936

 The following fixes has been made:

   - Removed prefixes like 'i' for new variables

   - Adding braces also for if-clauses with a single statement

   - Removed some trailing spaces

   - Changed variable precedingDRAP in Picture from int to bool

Update cfg file for rasterscan slice

Fix #524: avoid dereferencing of NULL pointers for APSs

See merge request !935

When calling pcPicCurr->finalInit() pointers to LMCS APS or Scalining List APS
can be zero. Dereferencing those is undefined. It's also not necessary, because
the arguments passed as reference are later converted to pointers again.

fix spelling of "length" in several messages

See merge request !928

JVET-O0428: check lmcs aps id in multiple slices of same picture

See merge request jvet/VVCSoftware_VTM!931

Implement option B for NAL unit header syntax.
NOTE: Neither the JVET-O0129-v2 or the JVET-O2001-vEJVET-O2001-vE documents specify a nal unit type NAL_UNIT_VPS, and this nal unit type is required. In this implementation NAL_UNIT_VPS is defined to be 25.

 Implementation of the Dependent RAP indication SEI message. Pictures are marked as DRAP pictures using the encoder config parameter DRAPPeriod, which sets DRAP pictures periodically. Conformance checks are performed at the decoder side to verify that the DRAP pictures follow the constraints in the VVC specification.