OpenEXR: Fixed issue where a stringvec of 16 items is mishandled as a maxtrix
Bump version for adding fixes for the next release
fmath.h: Move all the "using" outside the OIIO namespace.

If the 'using' is inside the namespace block, it's basically useless
to apps that include fmath.  This mainly affects functions that fmath.h
supplies because they are missing from certain MSVS versions.