v0.54 Stepper and Rotary-encoder support
adds:
support for Stepper-motors as described in:
https://github.com/firmata/arduino/blob/configurable/utility/FirmataStepper.h
example on how to use with perl-firmata:
https://github.com/ntruchsess/perl-firmata/blob/master/examples/example_stepper.pl
support for incremental rotary-encoders (currently incubating in firmata branch 'configurable_dev': https://github.com/firmata/arduino/blob/configurable_dev/examples/ConfigurableFirmata/ConfigurableFirmata.ino#L110)
example on how to use with perl-firmata:
https://github.com/ntruchsess/perl-firmata/blob/master/examples/example_encoder.pl