Add Cooper RF9501 & RF9540-N to Z-Wave product database

Documentation for the 2 devices can be found here should anybody wish to verify them:

RF9501: http://www.cooperindustries.com/content/dam/public/wiringdevices/products/documents/spec_sheets2/AspireRFSwitchSpecSheet.pdf

RF9540-N: http://www.cooperindustries.com/content/dam/public/wiringdevices/products/documents/spec_sheets2/AspireRFSmartDimmerSystemMasterSpecSheet.pdf