2.0.0 - Stream loading

I'm very happy to announce that Blaze3D now supports stream loading.  

You'll instantly see parts of your model rendered, even if the loading is not finished yet.  

Especially for large files this is very handy.

Full Changelog:

• Data is now streamed and rendered directly. Resulting in instant visual feedback
• Add stream_chunk_size to configuration
• Improve loading speeds by double buffering the loaded data Since this causes higher memory usage, you can configure it via double_buffer_data (Enabled by default)
• Remove on_duplicate_stl_vertex from configuration, now always assuming Allow
• Drop gpu_capacity_growth_factor from configuration, now handled internally