adding WITH_IMAGE_OPENIMAGEIO and removing the PSD build option
As per Brecht van Lommel's suggestion.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60686 954f8c5b-7b00-dc11-b283-0030488c597c
scons file for OIIO (needed for psd)
based on patch by Shinsuke Irie

note: scons is not working for me at the moment so I did not test this
patch. It should work fine though.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60687 954f8c5b-7b00-dc11-b283-0030488c597c