The ruler (#2138)

* Line ending stuff again

* Added initital files and layout for the PCB Ruler keyboard/macro pad thing

* Updated Readme

* Changed make command to new format

Add rasmus keymap and fix default keymap readme

adds the gh80_3000 project (#2132)

Add Lightsaver V3 keyboard

fixes audio/midi combinations

fixes midi compile error

update planck settings

fix up midi stuff w/music mode

Don't "unselect" left-hand rows

"unselecting" left-hand rows is a wasted i2c transaction.

On the left-hand side, the ergodox uses a GPIO expander. It
does *not* change "direction" (input/output) of pins, it just
sets pins high or low.

But all the pins are written at once. There's no way to
change just one pin's value; you send a full byte of all eight
row pins. (Not all of them are in use, but that doesn't matter.)
So every pin is either +V or ground. This is in contrast
with the right-hand side, which is using input mode to make pins
be neutral.

So there's no need to "deselect" the rows on the left side
at all. To select row 0, you set the GPIO register for the
rows to 0xFE. The previous code would then set it back to
0xFF, then set it to 0xFD on the next cycle. But we can just
omit the intervening step, and set it to 0xFD next cycle,
and get the same results.

And yes, I tested that the keyboard still works.

On my system, scan rate as reported by DEBUG_SCAN_RATE goes
from 445 or so to 579 or so, thus, from ~2.24ms to ~1.73ms.

Signed-off-by: seebs <seebs@seebs.net>

change the ?= assignments to =

some planck keymap shiftings and include proper-making

clean up bananasplit keymap

Trim trailing whitespace

Fix some of the more obvious typos

Format keycode tables

Convert all headings to Title Case

New Planck Layout (#2123)

* added own keymap for planck

* Update Readme.md

* Update Readme.md

* Update Readme.md

* Update Readme.md

* Update Readme.md

Turn on prevent stuck modifiers for my keymaps.

Updated copyright headers and peer review fixes

Update Meira readme