This is a dvorak-only layout. The overall philosophy is that the left hand contains a number of layer-switching shortcuts, and the right hand key codes vary based on the layer selected.
Layers
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* BASE: this is where you type.
* SHELL_NAV: hold down the Tab key to access shell/terminal navigation shorcuts such as forward/backward word, history, Ctrl+C, screen tab movement.
* KEY_NAV: arrow key movement with backward/forward word support, and copy/paste.
* KEY_SEL: same as above, but every movement shift-selects.
* Made the capslock key a dual momentary layer activation for BRACKETS and SHELL_NAV. One keypress held down for BRACKETS, one keypress, released and then held down for SHELL_NAV