Clean-up of 2 parts in the ISP code that are redundant. The changes do not alter the performance in any way, i.e., the results are exactly the same.

1) In the full RD intra mode tests loop (estIntraPredLumaQT) there is the following condition:
    if ( uiOrgMode <= DC_IDX ) -> do X; else-> do X.
Since X is the same in both cases, the redundant code has been removed.

2) In xRecurIntraCodingLumaQT there is the threshold definition

double threshold = nSubPartitions == 2 ? 0.95 : subTuCounter == 0 ? 0.67 : subTuCounter == 1 ? 0.83 : 0.91;

Since subTuCounter can never be 0 (it is at least 1) at the time this expression is evaluated, the code has been simplified in the following way:

double threshold = nSubPartitions == 2 ? 0.95 : subTuCounter == 1 ? 0.83 : 0.91;

- 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

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

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

- remove alternative code path for HM_EMT_NSST_AS_IN_JEM
- remove code in DMVR_JVET_LOW_LATENCY_K0217 (was not defined)

switched default value for CodingStructure::initStructData::QP from -1 to MAX_INT (signalling that the QP value for the CS should not be set)

    to w×h >= 64 luma samples

    See merge request jvet/VVCSoftware_VTM!34

Squashed commit of the following:

commit fb98d9c6
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Wed Oct 31 08:18:02 2018 +0800

    fix the variables for L0100 as suggested

commit 552f201a
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Wed Oct 31 00:52:58 2018 +0800

    fix the interaction

commit 3f0f36f4
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Tue Oct 30 12:17:43 2018 +0800

    fix distroy buffer size for L0100

commit 649dd1d2
Merge: 859c574b 5c46b9be
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Tue Oct 30 10:19:56 2018 +0800

    update the codebase

commit 859c574b
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Tue Oct 30 10:14:03 2018 +0800

    update the codebase

commit 694008b4
Merge: 0ac16832 e9bf7ed5
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Mon Oct 29 12:57:36 2018 +0800

    update the codebase

commit 0ac16832
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Mon Oct 29 11:23:51 2018 +0800

    modify MHIntra as suggested

commit a375e85c
Author: Shelly Chiang <chiangshelly@yahoo.com.tw>
Date:   Thu Oct 25 11:48:44 2018 +0800

    merge MHIntra into VTM