- save images with a uuid
- downscale images
- associate routes with wall
- group routes by pattern (pattern family has shift/mirror variations)
- generate pattern families of variations when importing problems
- implement pattern challenge (start an "adventure mode" based on a pattern family)
- Record problem success (enum: flash, send, no-send)
- implement routes page to show all routes for a given wall
- implement favorite routes feature
- use wall id in URL.
- decide on routes vs problems terminology
- decide on holds vs wall-edit terminology