cugeom: fix uninitialized reported by valgrind
analysis: cleanup
motion: this emms is required
analysis: motionCompensation(chroma) needs to be performed for asymmetric merge also

This fixes a bug introduced in commit (372a8230110a) for rd2 rect/amp options
param: fix w-s spacing in log messages for --rdpenalty and chroma offsets

and some nit fixes with braces while I was in the area
common: add support for debug breaks in Xcode
entropy: readability nits
analysis: adding support for --rd 5/6 in compressInterCU_dist() and parallelModeAnalysis()
analysis: further work on --pmode for --rd 5/6

Still needs debugging. The results with --pmode enabled have worse compression
than without, when used with --rd 5. That should be un-possible.
analysis: checkIntraInInter_rd0_4() needs the entropy context to be initialized
analysis: invalidate slave entropy contexts, to help find bugs

this function has no effect in non-checked builds
search: further --rd-penalty 2 fixes (refs #71)
entropy: improve check strings and comments
docs: update --tu-intra-depth / --tu-inter-depth docs (refs #71)
cudata: renames (m_depth, m_trIdx) -> (m_cuDepth, m_tuDepth)

No behavior changes
cudata: setTrIdxSubParts() -> setTUDepthSubParts()
cudata: remove unused setDepthSubParts
search: trMode -> tuDepth, improve clarity
search: fixes for chroma tskip coding with placebo preset

Move the tskip decision after the special logic that deals with 4x4 luma, etc
A couple of places where tskip == 0 was implied needed to actually set the flag
search: simplify handling of TU size edge case in extractIntraResultChromaQT