Don't transpose the matrix from XML
Add test file for comparisons with Blender Cycles.
Update XML representation of performance_tester.blend.

Camera should now give same result as the blend.
Remove redundant xml
Expand C API to integrator settings
Expand C# API to integrator settings.
Add integrator support to XML reading.
Add integrator settings.
API for integrator update tag.
C# API for integrator update tag
Read node, otherwise nothing will be read.
Use update tag.
use strings for booleans.
Fix awkward typo.
Always read samples and light sampling attributes.
Add sample and light sample settings.
50 samples.