From Luigi Calori, improvements to handling of install under Unix

CMakeModules/ModuleInstall.cmake

@@ -4,9 +4,15 @@
 # ${LIB_NAME}
 # ${LIB_PUBLIC_HEADERS}
 
-SET(INSTALL_BINDIR bin)
 SET(INSTALL_INCDIR include)
-SET(INSTALL_LIBDIR lib)
+SET(INSTALL_BINDIR bin)
+IF(WIN32)
+	SET(INSTALL_LIBDIR bin)
+	SET(INSTALL_ARCHIVEDIR lib)
+ELSE(WIN32)
+	SET(INSTALL_LIBDIR lib${LIB_POSTFIX})
+	SET(INSTALL_ARCHIVEDIR lib${LIB_POSTFIX})
+ENDIF(WIN32)
 
 SET(HEADERS_GROUP "Header Files")
 
@@ -15,6 +21,7 @@ SOURCE_GROUP(
 	FILES ${LIB_PUBLIC_HEADERS}
 )
 
+
 INSTALL(
 	TARGETS ${LIB_NAME}
 	RUNTIME DESTINATION ${INSTALL_BINDIR}