does a bit more refactoring so that data can be generated from scratch
Merge branch 'master' of github.com:embr/nonce
Merge branch 'master' of github.com:embr/nonce
adds an overall upload script
Merge branch 'master' of github.com:embr/nonce
Merge branch 'master' of github.com:embr/nonce
adds script for constructing category tree
Merge branch 'master' of github.com:embr/nonce