Add BistableInput and OrInput

v2.3.0

Release 2.3.0

Allow for signals with common anode, i.e. LED pins are active LOW.

v2.2.0

Release 2.2.0.

Add TwoPinInput.

v2.1.0

Release 2.1.0.

Call pinMode() in setup() rather than in constructors.

This fixes a potential race condition where pinMode() is called before the Arduino environment is ready for this call.
Ensure the pinMode() calls are made during the call to setup().

More complex topologies

Support for more complex topologies where signals may depend on routes through points/turnouts.
Also allow for describing rules with operators '&&' and '!'.

Introduce SettableInput for programmatic inputs.

MInor changes to facilitate programmatic input of block occupancy e.g. CBUS events from track occupancy modules.

Minor improvements

Small improvements to allow configuring blink interval and slow light transition interval.

Initial release

First release