#1 Re-organization of the mesh structure (+>200% Performance)

[Nils Schmidt]

In the current versions the part is stored as a single mesh and it is very time consuming to reload the whole mesh for every new scan-frame-event.
I'll split the mesh into many little Meshes to reduce the complexity.

The current complexity is in worst case O(m²) [m = count of all triangles]
The aimed complexity should be O(O(m_1²)+O(m_2²)+O(m_3²)+...+O(m_n²)) , where sum(1, n, i, m_i) = m

But some nice optimizations should increase performance more than this aimed target.