Update .gitignore
Add Realtek RT8192CU source v3.4.4_4749.20121105
Add DKMS configuration file
Add new device ID (330D)

Source: https://github.com/raspberrypi/linux/commit/ae67bed09d7a2b85a62c13b3ea1eecb487d04812
Add support for two more USB devices
Update driver to build under Linux 3.8 kernel