set option for ParamExt----random cases
Don't stash the cabac state into the SBitStringAux buffer

This fixes crashes on some platforms, and fixes valgrind
errors.
Remove the pBuffer parameter from the entropy encoder stash functions

The parameter didn't make sense since it only pointed to the
pSliceBsa field, which isn't what should be used to stash
the cabac context.
Revert unrelated changes to MSVC project file nasm commands

The cabac encoder commit accidentally changed some of the nasm
commands in the MSVC project file, that were previously
made consistent in b17e9bb32 and 7720f2cc5.
Merge pull request #1467 from mstorsjo/cabac-stash-fix

Don't stash the cabac state into the SBitStringAux buffer
Merge pull request #1464 from mstorsjo/unify-msvc-nasm

Revert unrelated changes to MSVC project file nasm commands
Merge pull request #1466 from shihuade/APIUTV1.5

set option for ParamExt----random cases