Merge pull request #417 from wolfmanjm/upstreamedge

clear AHB0 and AHB1 data sections
remove webif as it never worked and has been abandoned
Merge branch 'edge' of github.com:Smoothieware/Smoothieware into edge
Merge remote-tracking branch 'upstream/edge' into upstreamedge
Merge pull request #418 from wolfmanjm/upstreamedge

Fix extruder SOLO moves when in volumetric mode, so they remain mm and m...
Merge remote-tracking branch 'upstream/edge' into upstreamedge
add ability to disable play led in config
clean up some modules cleaning themselves up if not enabled
remove vectors that are not being used