updated readme to add new Firmata client libraries
added utility directory to release zip and set correct version number on zip file (configurable is v2.5.0)
Merge pull request #113 from firmata/make-release

fixed release.sh
remove duplicate word
add interrupt pins, see http://arduino.cc/en/Reference/attachInterrupt for more informations
create EncoderFirmata header file
add private method to report all encoders positions
improve documentation
fix syntax issues
add EncoderFirmata implementation file
implement EncoderFirmata
update IS_PIN_INTERRPUT macros, according to http://www.pjrc.com/teensy/td_libs_Encoder.html
update ConfigurableFirmata to manage Encoders
rename encoder utilities folder
fix synthax errors and and encoder unit tests
fix remaining bugs and improve testing coverage
move function to public to improve tests
improve tests and check for memory leaks
add example.ion file for encoders, including protocol proposal
improve documentation