This reverts commit 8e16ada0.

Patch provided by Nan Hu
Reduces LD chroma loss of JVET-O0491

- create ceilLog2() function based on floorLog2
- use intrinsics for MSVC in floorLog2
- replace all ceil(log2()) calls in HLS with ceilLog2()

- add option to completely disable
- add iparameter to software manual

Use vectors and resize them if needed instead of deleting and
reallocating memory for every picture. This appears to have a
significant impact on decoder run time.

Use PLTRunMode type where appropriate instead of bool since
using vector<bool> creates a number of issues

Remove partitioner factory to simplify memory allocation for the
partitioner (use stack instead of heap)

This reverts commit 43d0f72d

- The 16x16 coeff. zero-out for DST-7/DCT-8 is made disabled in VTM when MTS is turned off according to the suggested fix in #447.
- This fix does not change CTC results.