compositeRefEnabled is an encoder only option. It should not be stored in the SPS.
This commit is the last to remove unused parameters from SPSNext. Thus also
all comments related to SPSNext are removed.

- 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

- 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.

This reverts commit 3574c11d.

Two changes are included: (1) disable fractional MVD for UHD sequences (M0312 & M0255) (2) encoder optimization for MMVD

finalize QPA code, introduce sub-CTU QPA for <=HD sequences, encapsulated in macro ENABLE_QPA_SUB_CTU

commit b6dc7a27e7ad4e7092048c42d42b4cbeaa7b820c
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Thu Nov 1 04:12:44 2018 +0100

    Update EncSlice.cpp

commit cd48a172780d97d34321a04fc34a490875963f4b
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Wed Oct 31 17:34:09 2018 +0100

    Update UnitTools.cpp

commit 302b8376ac309f0933dacda05396b7f2a6215960
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:15:29 2018 +0100

    Update VLCWriter.cpp

commit 57f9db29ef7ddaaf4c6d1a5e93c30b64f53c8b57
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:14:58 2018 +0100

    Update EncSlice.cpp

commit f5a1228257a4c801486ef6e05b7eadf045082a4f
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:14:29 2018 +0100

    Update EncLib.cpp

commit e896521f4e136d0f445cbb5bf099a5c834638294
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:11:45 2018 +0100

    Update EncCu.cpp

commit 5cc65b9961b854c0d6b56d87c7b8836deed4f449
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:11:12 2018 +0100

    Update CABACWriter.cpp

commit 73a06370556b6d75d2f28aba85bd16673c3c0824
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:10:34 2018 +0100

    Update EncCu.h

commit f48f7bdd41907bd02bc7d9988050e3cdce479d39
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:09:54 2018 +0100

    Update EncCfg.h

commit 95aacd519dece1f430ca6ba13a14ba7440298d96
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:08:58 2018 +0100

    Update EncAppCfg.cpp

commit a113fb3461b96a9d02b52953909302457bbf2130
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:08:11 2018 +0100

    Update EncApp.cpp

commit a4b988779611a7c5390c21d5f406b226ae9ca7db
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:07:42 2018 +0100

    Update EncAppCfg.h

commit 6860930bbf4a38437790f66a136413b1f41ab8c9
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:06:56 2018 +0100

    Update VLCReader.cpp

commit 4e2726b0dd9a0002c662f1547b2418b6c55be493
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:06:14 2018 +0100

    Update UnitTools.cpp

commit 6f08ee7fd76fee41f30ff0f796df249fd072d5f9
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:05:24 2018 +0100

    Update Slice.cpp

commit ad97fd292506773d8ca0d5f652c5dc58394e0138
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:04:19 2018 +0100

    Update InterPrediction.cpp

commit fe00146678fc247f5844556fb94fc07722bcce5a
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:03:33 2018 +0100

    Update TypeDef.h

commit 5b7e05a0b3b26d3f99d0ee251849a835fca988cb
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:02:32 2018 +0100

    Update Slice.h

commit ad1303b63b8fd19e4fa2e50c12195976135dbbd5
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 17:59:43 2018 +0100

    Update CommonDef.h

commit b3b4949ca7f30b1821b736a4b1ed22ace5473232
Author: Xiaozhen Zheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 16:54:48 2018 +0100

    Update InterPrediction.cpp

commit 66638421cb24a4a4e701307d5a2f897b2f81316b
Merge: e72c694 25e9c3a
Author: xzheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 18:03:03 2018 +0800

    Merge branch 'L0198_L0468_L0104_ATMVP_SIMP' of https://vcgit.hhi.fraunhofer.de/XZheng/VVCSoftware_VTM into L0198_L0468_L0104_ATMVP_SIMP

commit e72c694e51301e915ecbc1afaba0237b2466330f
Author: xzheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 17:46:41 2018 +0800

    Change macro name "JVET_L0198_ATMVP_8x8SUB_BLOCK" to "JVET_L0198_L0458_L0104_ATMVP_8x8SUB_BLOCK" and modify the committed codes followed by software guideline.

commit 25beb4b25913ad09d31001d1337878b2db3da7ba
Author: xzheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 00:37:06 2018 +0800

    Fix ATMVP subblock size to 8x8 and simplify ATMVP neighbouring block scan. Integration of L0198, L0468 and L0104.

commit 25e9c3a950ecb23edbc2bd4822238c27335b10cd
Author: xzheng <xiaozhen.zheng@dji.com>
Date:   Tue Oct 30 00:37:06 2018 +0800

    Fix ATMVP subblock size to 8x8 and simplify ATMVP neighbouring block scan. Integration of L0198, L0468 and L0104.

1. JVET-L0271:              Simplification of affine AMVP list construction
2. JVET_L0694/L0045/L0047:  Combination of affine mode clean up and line buffer reduction
3. JVET_L0632/L0142:        Affine merge list construction
4. JVET_L0369:              Moving ATMVP into the affine merge list