Added backlight.h, backlight.c

Initial commit for Planck PCB Rev 1.
- Backlight on PB7 controlled by Timer1 Fast PWM (no interrupts).
- Backlight commands connected temporarily to top left keys.
- Backlight init called from matrix.c, since there's no generic keyboard_init() override function.

brett

simon

brett

led oops

vlad

joe

joe

joe

joe

sean

Merge branch 'master' of https://github.com/jackhumbert/tmk_keyboard

Merge pull request #4 from pepers/master

defined semi-standard and short space layouts

defined semi-standard and short space layouts

Merge pull request #3 from pepers/master

defined KEYMAP_GRID for grid layouts

defined KEYMAP_GRID for grid layouts

Create keymap_matthew.c

Create keymap_nathan.c

subproject commit?