FEATURES
- pshell: convert scienta data to true counts
- pre-process: add gauss2_reduction data reduction function
- anglescan: add set_contrast and normalize_strip_phi functions
- explorer: show info about multi-region scans
- documentation: add detailed instructions for angle-scan processing
BUGFIXES
- explorer: fix attributes notebook
- pshell: fix progress bar
- elog: increase the number of accepted attachments