v0.0.2

This mostly stabilizing release brings:

• new modes for output geometry override available under the Advanced option: now it is possible to clone nodes and spawn node references instead of mesh cluster instances;
• generation of box shapes based on bounding boxes;
• support for generated UV maps from UV0 and UV1 attributes;
• better and more stable memory management (such C++).

This is the last release compatible with UNIGINE 2.15.1, further work will be done using the 2.16 version.

And as always, any feedback is much appreciated.