Update doxyfile & css to match tmrh20.github.io

Per #27 update to match http://tmrh20.github.io docs
character fix
Merge pull request #28 from lnxbil/printDetails-fix

character fix
Merge RPi and Arduino code

Merged code to simplify everything
- #31 Timing of stopListening() adjusted slightly to further prevent
blank ack-payloads if powering down while using ack-payloads or
switching between modes