added a "unit" parameter to the importers -> the svg/dxf importers can re-scale the model now, if the user configured "mm" instead of "inch" (pstoedit seems to output scaled to inch)


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@608 bbaffbd6-741e-11dd-a85d-61de82d9cad9

increase the maximum scale percent value to 10000 (allows 2540 for mm/inch)


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some cleanup for the release


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improved some minor issues


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fixed unit change for bounds


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change default safety heigth to 25 (before: 5)


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changed installation directory names from python-pycam to pycam


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* shifting components of transformations are ignored for these instances
* useful for Normal vectors (Planes, Triangles)
* fixes collision detection border cases after model transformations
fixed "point_inside" method of "Triangle" class
collect only basic elements (Points, Vectors) in TransformableContainer collection list (avoids skipping of partially transformed instances)


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reduced epsilon


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