Reversed button scroll direction, removed cruft, linLog Visualization
is now started after boot. Revised filter for audio data.

Thanks to Peter Dannegger. Also added another visualization, linear and
logarithmic together.

Beware: freeing static, unallocated memory will cause very strange
behavior!

Finally, the moment you all long awaited :)

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.

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.

Wrote new audio visualizer. Created help functions to operate on a 3D
image buffer.

Setting the DDR of the serial pins before initializing the serial
hardware caused some logic '1' spikes on the tx line.