VOXELFORMAT: saving VXR/VXA loses transforms

[mgerhardy]

• [x] Add VXA2 saving
• [x] Bump VXR version to 9
• [x] Fix transforms in VXA
• [ ] Maybe also add animation support into the scene graph - currently only one animation is loaded (the default anim). Thus re-saving the vxr will lose all other anims

[mgerhardy]

d6a751dd60b3f2b581b9aa99000dcb9a8975f5dd this preserves the node hierarchy already. transforms are still missing though.

[mgerhardy]

85b00430dac0d55ebaf2df513adf78188e6735ee writes version 5 now - still a few versions to go

[mgerhardy]

4c159c6e4892b7529eeddc3bbdae4ffbc9da506a writes version 6 now

[mgerhardy]

7defbb50b57f445c70d3701dfa7a17f8bc56a288 writes version 7 now.

[mgerhardy]

4fe6e7aa9522e4c5c13e0f09de5ab6d204535fe3 writes version 8 now.

[mgerhardy]

fbc7cf89a58fea24a7123164f895b11fce092a39 and bceac031f85a0b7e5df8f251a8e87c57dc682dec prepared for vxa saving and bumped vxr to version 9

[mgerhardy]

f1621ab1cd5e15f97e9d5ab6669352e918f8243e activated the vxa saving - but the md5 calculation is still missing and the only saved vxa is a dummy animation (the default)

[mgerhardy]

a8b7de3de4f5398bea4e7104c24f160489e92c74 improves the default animation stuff a little bit - so only md5 calc is missing.

[mgerhardy]

a768b30cddbb213bc59c6651c69312993ff682ef adds the md5 stuff

but transforms are not yet correct

[mgerhardy]

Transforms are now loaded correctly. But there is a follow-up ticket https://github.com/mgerhardy/vengi/issues/182