- Minor improvements to Tiff saving.
- Support for diffusion coefficient changes at surfaces.
- Improved error handling, command line input, and logging functionality.
- Added command line options with double hyphens.
- Fixed some issues that caused compiler warnings.
- Fixed a bug in the rate_rule statement.
- Increased standard string lengths from 256 to 512 characters, and long strings to 4096 characters.
- Fixed sphere reflection algorithm for the "bounce -2" setting.