Calibrated main screen, adding calibration files

Calibrated the Asus UX581L screenpad using the Spyder2 Colorimeter

Script to install the Spyder2 driver systemwide from the CVSpyder.dll
file using Argyll's oeminst tool

Copied from https://gdargaud.net/Hack/LinuxSpyder.html, annotated with
additional notes from --help output, and slightly modified for higher
quality.