Ferram Aerospace Research v0.15.7 "Küchemann"

Update to ModuleManager 2.6.25
Update for KSP 1.1.3 compatibility

Implement higher resolution sub-voxel voxelization method
Allow switching between high and low res sub-voxel methods
Optimize voxel shell generation, particularly for high triangle count meshes
Increase the resistance to sideways aerostructural failures for many fuselage and rocket parts

Fix voxelization error that would lead to transparent mesh objects being voxelized
Fix voxelization errors that could lead to incomplete voxelization of some stock procedural fairing shapes