BUSTER tutorials

1. IF3-C.html: refinement and completion of a 30% incomplete structure;
2. barnase.softNCS.html: soft-NCS (constrained) refinement and completion of a 25% incomplete structure;
3. barnase.hardNCS.html: hard-NCS (restrained) refinement and completion of a 25% incomplete structure;
4. SCAFet.html: rigid-body refinement of a molecular replacement solution;
5. PP_PI-3.html: refinement of a 40% incomplete structure after molecular replacement and rigid-body refinement.