Implementation of BRepOffsetAPI_MakeFilling

[bragostin]

This is an implementation of the OCC function BRepOffsetAPI_MakeFilling into CadQuery in order to produce a plate surface with a thickness (optional), enclosed by edge points, polylines or splines, and going through interpolation points (optional) .

[codecov]

Codecov Report

Merging #253 into master will not change coverage by %.
The diff coverage is n/a.

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  Files          18       18           
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  Hits         4162     4162           
  Misses        216      216           

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[bragostin]

@adam-urbanczyk good idea, I will make a separate PR for thicken since it should work for any 2D surface actually, not only those from interpPlate

Regarding the pushpoints issue, it works fine if combine=False. So for the time being I have set the default value at False in the interpPlate function. I have added a short info about that in the docstring also. Is that ok?

As you suggested I have also set thickness=0 in the interpPlate function.

[bragostin]

From my side I would say that this is ready to be merged. I think I addressed all the issues,or is there something missing?

[jmwright]

@adam-urbanczyk Any objections to me merging this now?

[adam-urbanczyk]

This is quite big PR (thanks for the work @bragostin !) so give me a day or two to take a final look @jmwright .

[adam-urbanczyk]

Thanks again for this PR @bragostin !

[bragostin]

@adam-urbanczyk, my pleasure, thank you for taking the time to check the code!