- 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

There is a conflict with JVET_M0427_INLOOP_RESHAPER that is triggering a debug assertion that checks that the width is not 1.

- sps_sao_enabled_flag
- sps_alf_enabled_flag
- pcm_enabled_flag
- pcm_sample_bit_depth_luma_minus1
- pcm_sample_bit_depth_chroma_minus1
- log2_min_pcm_luma_coding_block_size_minus3
- log2_diff_max_min_pcm_luma_coding_block_size
- pcm_loop_filter_disabled_flag
- sps_ref_wraparound_enabled_flag
- sps_ref_wraparound_offset
- sps_temporal_mvp_enabled_flag
- sps_sbtmvp_enabled_flag
- sps_bdof_enabled_flag

fixed encapsulation in previous commit, corrected some conditions in previous commit, replaced remaining tabs with spaces, corrected some indentations

Part 1: change definition of QG, by JVET_L0362_QG_FIX
Part 2: fix encoder-side cu coding info reusing fast algorithm (i.e., reuse cu info when having the same neighbor and the same qp), by JVET_L0362_QG_FIX_CU_REUSE

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

This is JVET L0054 MMVD code.
MACRO is JVET_L0054_MMVD.

See merge request !26

Squashed commit of the following:

commit d9b44c28
Author: seungsoo <ss00.jeong@samsung.com>
Date:   Fri Oct 26 08:28:35 2018 +0900

    code update ( reflection )

commit 1fd1b434
Author: seungsoo <ss00.jeong@samsung.com>
Date:   Thu Oct 25 10:59:22 2018 +0900

    code update ( reflection of commented things )

commit 3befe26e
Author: seungsoo <ss00.jeong@samsung.com>
Date:   Wed Oct 24 13:18:27 2018 +0900

    JVET_L0054_MMVD is uploaded.