Update to Modern Arduino API Standards

[oclyke]

This library uses some outdated concepts / AVR-specific code. It CAN (haha) be updated to work on many more Arduino platforms. See this forum post for more details:
https://forum.sparkfun.com/viewtopic.php?f=169&t=53206&p=216453#p216408

[dasfdlinux]

Do you have a recommendation of a library that is less outdated that I could compare this to when making improvements? I've used this library with several circuits that have various pinouts, and have had to modify the library itself for pin definitions instead of just changing a constructor or initialization function.