HID based IPTS and ITHC support, 6.1 edition

[StollD]

iptsd feels pretty much ready and will work better than what is currently in the repo, so lets start doing this ...

Things that need to be done once this is merged:

• Update CONFIG_MISC_IPTS=m to CONFIG_HID_IPTS=m in our kernel configs
• Add CONFIG_HID_ITHC=m to the kernel configs
• Bump iptsd version to 0.6 and tag a release

Changes since #132:

• ITHC: https://github.com/quo/ithc-linux/compare/67ebf094f271478dd4ba3dddc210ca779bac9f31...e1c3978daefee9a944270c3b059534d5227af3e8
• IPTS: https://github.com/linux-surface/intel-precise-touch/compare/f4c781af0908fbf24517de97235e788283f363af...19e8512a8110186fe772fbdc534c98139d65943d