Integrated versions of frame_motor/corner piece and frame_cheek,
frame_endstop and frame_top from original kossel. Frame_integrated_45
is a copy of Johann's frame_integrated with two changes; vertical openbeam
piece is rotate 45 degrees as with original kossel plus ends of horizontal
openbeam pieces align with the center of the vertical. This cause the
dimensions of the updated kossel to be the same as the original when used
with existing 300 or 360 horizontal pieces The top_integrated_45 is based on
frame_integrated_45 but with a single horizontal, endstop mount, arc cutout
as with original frame_cheek/endstop and clearance for the tensioner_608
piece.