* 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
* changes to COMBINED layer (pipe on the right) and modified shell nav
* moved pipe/backslash to then right
* documented SHELL_SCREEN layer
* put backspace/delete on SHELL_NAV layer