Review: Windows Support Bugfixes

Jeremy Selan <jeremy...@...>

Added a bunch of windows build fixes. Thanks to the Foundry for
providing this hitlist. Biggest change of note is the updated from
yaml-r423 to yaml-r482. This was a yaml major version change, and
required internal updates to use the new API. Known issue: Only
addresses windows build issues in the core library, still have to
address the src/nuke subdirectory.

-- Jeremy