Also better filtering for audio data in AudioFirmware.

Poti is now a multiplication, from 1 to 3,5. Also added basic noise
filtering. UploadTest can now send a specific byte as frame data.

Rewrote MSGEQ7 Algorithm. Removed stdlib.h dependency, thereby reducing
the flash needed by 50%. Interrupts no longer enabled in twislave, but
in main.

Audio CPU now resets MSGEQ7 properly. Bufferhelper clears memory after
allocation. Z Axis now goes into the correct direction. Removed
FillRect. Enabled Watchdog for Debug Build, too. Removed unneeded
strings. Built-In Framedata in own file. Makefile cleans object files
after every build, because it doesn't matter. Simple Visualization
works correctly. Most recent Hex-Files now included.

Audio Firmware now with Watchdog. Removed unused code. Fixed compiler
warnings. Fixed cube coordinate system problems. Fixed audio display
rotation. Nicer Idle Display with SAP Logo. Increased Firmware Version
Number. Debug Build even more talky.

Now talks to FRAM most of the time…

This was done because I was suspecting an error to be there. This is
not the case, so we probably have a Hardware Problem with our USB
Serial Stuff… If we send data too fast it sends garbage. It also always
sends two additional bytes (0xC2 at the beginning, 0xFF at the end),
which both come at the beginning if we don't delay between sending the
chars…