Remove old unused PFD artwork
Remove old version of current PFD, out of sync with GCS
Remove two WIP PFDs that were never used
Remove PFD directory, also old readme file.
Old MultiRotor Shapes svg removed, unused and out of date, current is in the source tree
Old AHRS board image, incomplete and AHRS went long ago
Remove old CopterControl image, once used for the firmware screen
We now use a 3D view which the artwork is not in this folder at all
Remove old mainboard image, very old hardware

The rest of the files in this directory could be useful, they are source artwork for things like the map
Unsure if these are used still, fixed typeo in readme, added link to Tango project
Remove work in progress dials
Update Readme to remove referenced to WIP dial set and also GuyMc sets which did not exist in the tree anyway
Remove old system diagram for old OP AHRS design
Remove old CopterControl diagram, very pretty but unused these days
Remove Android folder, unused and only contains one resoultion also
Remove old Google Sketch image
Add a simply readme