* Add Contra Shield (#1)
* Add bluetooth control layer to contra keymap (#2)
* fix contra keymap issues
* add bluetooth control layer
* clean up contra files
* add contra.conf file
* add missing bracket for default_layer
* update copyright year to 2021
* add contra metadata file
* refactor pro micro overlay for new syntax
* Basic Clueboard Californai Macropad shield definition.
* New "direct" KSCAN driver that supports non-matrix direct
wiring for switches, needed for macropad that doesn't have
a matrix at all.
* Some renames for existing KSCAN GPIO driver to make the implied
"matrix" part explicit.
* Allows "gaps" for keyboards like Kyra.
* Allows keyboards with matrixes that don't map the logical key
locations to have normal looking keymaps when defined.
iangus