[#74] CryExportNode Bugfix

Before selected objects were included in exported geometries and visual
scene elements.  Now, only objects/visual scene elements in
CryExportNodes will export.
Not that I know of, pose bones are not included in scene.objects.  Bones are not considered objects and always are contained within an armature object.  This will acquire the fakebone with equivalent name to the current pose bone since fakebones are cubes and considered objects.