V0.2.0

Update:

• Major rework of LoD3.2 logic improving computing speed and accuracy.
• Rework of intersection logic.
• Rework of shape simplification code.
• Added obj and step exporter.
• Added site exporting.
• Added LoD0.4, LoD3.0 and LoD3.1 exports.
• Added window and door semantic info in LoD3.2 export.
• Added semantic data to the voxel output.
• Improved computing speed.
• Minor stability improvements.

Issues to be addressed before release:

• Slow shape writing on complex LoD3.2 and Voxel shapes.
• Bad information for LoD3.2 export.
• Incorrect inner ring orientation on complex shapes.
• Missing or repeated verts on complex shapes