Bring master up to speed with current progress

[mastersta]

Working:
-Annunciator lights all correspond to lights in sim, either exactly or with an appropriate analogue (if one exists)
-All five basic controls are input as analog joystick axes

Known issues:
-Annunciator occasionally gets overwhelmed, especially with repeated annunciator tests, and will attempt to lock up the entire arduino. Watchdog timer is implemented that attempts to clear the I2C bus and reinstate communications with PC.
-Annunciator occasionally "falls behind" the simulator. This has been mostly mitigated by slowing down the communications coming from the PC by half. May need further work.
-Analog controls are very noisy. Doesn't noticeably affect flight, but may still implement hardware low pass filter to mitigate visual shaking of virtual controls.

TODO:
-First pass at implementing button/switch inputs