There's so many control keys in this keymap, one needed to go. So, I changed
the lower-left control key to be a momentary L1, just like the same key on the
right side.
This keymap attempts to match the Kinesis Contoured (aka Advantage) default
layout as closely as possible. See
http://www.kinesis-ergo.com/wp-content/uploads/2013/06/advantage_layout_win.pdf
Apart from the obvious mappings, this keymap also:
* removes the dual-purpose momentary layer/normal keys: Z, /, and Grv;
because the author--coming from a Kinesis keyboard--finds the delays and
accidental modifiers to be more disconcerting than helpful.
* puts Esc in the bottom left since there's no place for it in the top
left to match the Kinesis.
* changes the bottom-right key into an L2 toggle since there's otherwise no
way to get to L2.
* adds PrScr, ScrLk and Pause to the L1 keymap, down the left side, since
they're present on the Kinesis but not available in the default
ergodox_ez keymap.
- removed access to layer 2 from ";" key
- "fn" key toggles both layers 1 & 2
- replaced media and mouse layer by fn layer
- renamed symbol layer to numbers layer
- moved all F-keys together on left hand
- home replaced by KC_TRNS to make backspace available
- prev/next moved left to space to restore ralt
- arrows moved down to have reversed T-shape
- added ctl on bottom right KpEnter, to match layer 0
- removed alt from mute, as it was already no more in layer 0
- keep home/end at the same location
- RAlt as first key on the bottom right row
- left/right arrows moved on the thumb, near the other arrows
- added Alt on App
- added Alt on Mute in Layer 1
- removed ALT from left spaces to avoid issues when pressing too slowly
