Switch plan

switch.fan1.enable              true     # this tells Smoothie to create a new switch named "fan1"
switch.fan1.startup_state       false    # this sets the initial state of the switch
switch.fan1.input_pin           2.11     # watch for changes on this pin
switch.fan1.input_pin_behavior  toggle   # valid options are "toggle" and "momentary"
switch.fan1.input_on_command    M106     # any command that starts with this exact string turns this switch on
switch.fan1.input_off_command   M107     # any command starting with this exact string turns off the switch
switch.fan1.output_pin          2.12!    # this pin will follow the state of the switch
#switch.fan1.output_on_command   M106     # this command is sent whenever the switch turns on
#switch.fan1.output_off_command  M107     # this command is sent whenever the switch turns off

switch.zplus10.enable               true
switch.zplus10.input_pin            0.1
switch.zplus10.input_pin_behavior   momentary
switch.zplus10.output_on_command    G91 G1 Z10 G90   # G91 and G90 toggle to relative positioning and back to absolute
switch.zminus10.enable              true
etc...

TODO:
 - input_pins (multiple input pins with individual behaviors)
 - output_pins (multiple output pins)
 - input_x_commands (?) (multiple input commands)
 - analog input_pin_behavior (read analog pins)
 - input_x_command parameter (ex. M106 S100 to set analog value)
 - analog state, up down input_pin_behavior (move state from binary to float)
 - analog output_pin_behavior (add output_pin behaviors and some sigma-delta)
 - output_x_command parameter (so switch can generate an M106 S100)