Interpretation's layer id should follow the same conventions as the rest of the tree (parts separated by a dash)
Add a script to generate the json tree (similar to the generate_layers script)
Update interpretations layer to handle the new label id for interpretations
Merge branch 'master' of git://github.com/eregs/regulations-parser
JSON tree generation takes path to plain text + part as params
Merge pull request #18 from cmc333333/master

Fix bug with interpretations' label and add script to generate tree as JSON