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(cad/klayout/Makefile) Update HOMEPAGE

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Import klayout-0.24.5 as cad/klayout.

 Although a comparatively simple piece of software, a layout viewer is not
only just a tool for the chip design engineer. Today design's complexity
require not only a simple "viewer". Rather, a viewer is the microscope
through which the engineer looks at the design.

There are numerous viewers available, but sadly there are not many which
satisfy a few basic requirements. Most of them are commercial and
expensive. If there is need for a simple, yet powerful viewer - here it is.