[libredwg] Testing suite samples

[Rodrigo Rodrigues da Silva]

It just came to my mind that maybe we're taking the wrong approach 
building these samples. My point is: a dwg file created by a converter 
and from an SVG file will be limited to the subset of entities and 
objects supported by the converter. Besides, an SVG file carries less 
information than a DWG file (we'll never get any DIMENSION, MESH or 
3DSOLID entities or an OLE2_CONTROL object from a SVG2DWG converter).

That doesn't mean they're not useful, we can still test most of the 
common 2D entities and run performance tests.

I've got a couple of R2004 files that I can release to the public 
domain. Althoug, they are fairly simple and wouldn't cover all the 
objects and entities, not even common ones like dimensions.