* Created test fixture for virtual outputs
* Added virtual output configuration to keymap definitions removed special
actions_send_reset() and actions_send_screenclear() functions, and replaced with
virtual output definitions.
* asdf_actions.c is removed from build.
* asdf_arch_atmega328p.c: added functions to set/clear each real output
* asdf_arch_atmega328p.c: added pulse_delay() function
* asdf_arch_test.c: added mock machinery to emulate outputs, test output
settings, and detect properly and improperly-formed pulses on the outputs.
* asdf_keymaps.c: allocate initialzer array. asdf_keymaps_select_keymap() calls
asdf_virtual_init() with initializer list for the keymap to set up the LEDS and
outputs every time a new keymap is selected.
- add caps key function, similar to shift. This is intended for a DIP switch
setting to switch the keyboard between all CAPS and upper/lower modes.
- clean up the modifier state enums to include all legal values
- clean up the modifier index value calculation to improve readability.
