Keymap: Ergodox Dvorak 42 key layout changes (#3500)

Keymap: Ergodox Dvorak 42 key layout changes (#3500)

* add SCREEN_NAV layer for copy/pasting within screen

* working readreg/paste macros

* working read reg / paste macros

* write log and tran patterns, and expand

* add ls -la shortcut, add tab on combined layer

* put delete word on the right pinky key on shell_nav layer

* add TAB on the right side, add reset key

* added Cloud9 macros

* add cloud9 shortcuts to atreus layout

* added BROWSER_CONTROL layer

* finalized browser control layer

* adding comment

* add browser control layer to atreus

* add flashing command line

* remove the tab on combined layer

* remove the tomouse

* remove mouse layer, change log/tran expand patterns, cleanups

* add dumptlog macro

* add "delete to home" shortcut

* fix conflict

* remove unneeded mouse layer

* add meh shortcuts on the browser_control layer

* add/modify some macros

* explain the various layers