add Johanns Marlin solution to the arm solutions, basically the same as RostockSolution just done differently
Plus the XYZ motors as specified on Kossel will match up with Alpha Beta Gamma motors.
Merge pull request #182 from wolfmanjm/add/johann-kossel-arm-solution

add Johanns Marlin solution to the arm solutions, basically the same as ...
Merge remote-tracking branch 'upstream/edge' into vikilcd
redo watch screenthe way arthur intended
optionally do not clear screen on refresh_menu()
watch screen does not clear screen of refresh
add refresh_screen for wathc screen or screens that have no menus