Made CEGUI_LIB_INSTALL_DIR obey option definition aswell
Made CEGUI_LIB_INSTALL_DIR obey option definition aswell

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branch : v0-8

cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two