o Make space around heatsink configurable. Make it a bit larger
  than before (2mm all around insetad of 0.5mm).
o add 'mounting plastic studs'.
o update stl.
o Make support around heatsink a bit thicker.
o update images.
o widen drill holes a little bit.
o widen BNC cutouts.
o add melt-joint image.
o update stl file.
o Add link to thingiverse.
Merge pull request #1 from hzeller/master

getting up to date