New LLD: HVGA_X81
For HVGA : 320 x 480, 16bpp displays,
controlled by ILI9481 or compatible controllers.

* Pixel readback TODO
* Powermodes: Sleep implemented
Renamed HVGA_X81 to ILI9481
Merge pull request #66 from abhishek-kakkar/master

New LLD: ILI9481
updated license headers
fixed 3rdparty demos path
Revert "fixed 3rdparty demos path"

This reverts commit dca2721b9de72b4435dfb80b8c7c9c2ac89ed370.
Revert "updated license headers"

This reverts commit 0a26d9983b6d1deab272ff6dde98f7c77ff2a56c.