Ergodox EZ and Atreus 42 key dvorak layout updates (#1964)

* importing 42 key dvorak layout

* added comment for build instructions

* adding atreus dvorak 42 key layout

* added readme

* add readme

* build instructions

* additional MEH shortcuts

* added shifted symbols on symbols layer

* working extra symbols on COMBINED layer

* bring atreus layout inline with the ergodox one

* add necessary macros

* working ls macro

* added more shell macros

* added screen rename / screen number macros

* add ctrl-a key in shell-nav to use screen more easily

* added shell screen layer

* assign screen switching macros to screen layer

* define all screen switching macros

* more screen-related shortcuts added on shell screen layer

* change shell nav bottom right row to match base layer (backspace / delete)

* remove some mappings on SHELL_NAV layer as they are now in the screen layer

* added more screen macros

Correct the rules.mk documentation for auto shift.

fixes #1965

Fix RGBLIGHT startup color (#1975)

* Fix RGBLIGHT startup color

While it's awesome to see the layer indicating code in here (no really!), and the general rule is to not alter the default keymap/code....

The problem with the layer_state_set_kb call handling this, is that the code doesn't seem to be called at startup.  So the default layer color won't ever get set on startup.  It needs to be called in the init function to be properly set. 

I've played with this extensively, and if you check my keymaps, that is precisely why I have the setrgb/sethsv in the init function.

* Removed typo (pipe)

Merge pull request #1974 from qmk/f/ez_shine_layer_leds

Shine layer indication

adds indication up to layer 7

restore default mode/color if no 0 color

adds per-layer rgb color option to ez

update gh60 info

add gh60 info.json

several improvements for mitosis:datagrok (#1960)

* mitosis/datagrok: reduce features from rules.mk

* mitosis/datagrok: make both layer keys neighbor shift

* mitosis/datagrok: (no-op) tweak some comments

* mitosis/datagrok: set baudrate to 250k

This requires a corresponding change to the mitosis wireless firmware:
https://github.com/reversebias/mitosis/pull/10

* mitosis/datagrok: move design description from code comment to a readme

* mitosis/datagrok: new layout, new shifted keys, efficient LED code

This is experimental, but compiles and seems to work correctly.

* mitosis/datagrok: whoops, move readme.md

* mitosis/datagrok: a minor layout improvement simplifies custom-shifted code

instead of [, .] [? !], using [, ?] [. !] greatly simplifies the code
needed to perform the shifted-key switching. (And keeps , and . on the
same keys that they are under qwerty.)

also: layout improvements for symbols

* mitosis/datagrok: make my code conform to QMK style guidelines

* mitosis/datagrok: TODO note for layout table in README

* mitosis/datagrok: remove led_set_user until i figure out other changes

need to see if the corresponding changes needed in the keyboard-level code
is okay.

* mitosis/datagrok: simpler layer indicator

* mitosis/datagrok: undo change to keyboard baud; make it in my layout dir.

* mitosis/datagrok: apply same punctuation hack to qwerty layer

* mitosis/datagrok: enable qwerty layer toggle

* mitosis/datagrok: update readme

Added hand-swap matrix to the mitosis

have led default to off on start up

make more generic, and properly handle inits

fix a typo

Do some cleanup for the API

use real greater than and less than chars

fix labels

add labels to the clueboard layout

Merge branch 'master' of github.com:qmk/qmk_firmware

fix the clueboard layout json