Resolve "asciih5block not working with recent H5Hut library?"
- Fix #469 (closed)
- Add new file from Hui Zhang with B-field and adaptive limits (possibly closer to original)
- Fix some comments
- Adhere to coding style
- EDIT 19-2 Add BANDRF script to CMake
- EDIT 26-2 Remove old script with hardcoded values to reduce duplication
- EDIT 28-2 Make Efield and Bfield input optional