Fixed exports on DeepImageChannel and FlatImageChannel. If the whole class isn't exported, the typeinfo doesn't get exported, and so dynamic casting into those classes will not work.
Also fixed angle-bracket include to a quoted include.
Fixed order of libraries for static linking. IlmThread depends on Iex, so that has to come first.
Fixed angle-bracket vs quoted include. OpenEXR should be using quoted includes for library includes.
Houdini builds debug libraries with a '_d' suffix to differentiate them in the same build.