Only used 8bit vars, while 16bit were required.

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.