make queryPinState method public

[soundanalogous]

I made this private for a reason at some point. Have had requests for the functionality it provides however so I'll look into making it public again.

[soundanalogous]

This is now public but it should not be called in most cases since the client keeps track of it's pin states. I have also exposed a getPins method on IOBoard that will return an array of all pin objects for the IOBoard. It is better to call the getPins method to get the state of all pins rather than calling queryPinState to get pin states directly from the Arduino.