* Standardize serialization
- Linting
- Standardize serializer use throughout code
- Extend serializer to load and save files
- Always load and save in utf-8
- Create documentation
- Fix filter/nfilter for convert
- Remove existing snapshot folder before creating if it pre-exists
- Don't initialize training session until after first save. "Nonetype" session fix
Tool: Add tool to restore models from backup
Snapshot: Create snapshot based on total iterations rather than session iterations
Models: Move backup/snapshot functions to lib/model
Training: Output average loss since last save at each save iteration
GUI: display_page.py: minor logging update
