First pass porting streams2 changes to main module.
Update supporting files for streams2.
Fix params in handleError method.
Remove unneeded dependencies.
Don't try to nest children since we're streaming now. Also include meta (unless turned off in options) with all outline elements.
Refactor to add outline node ids and parent ids and eliminate unneeded object creation.
Update package dependencies
Don't emit meta or add meta to data.
Remove normalize option.
Move category and folder parsing to where the rest of the parsing is.
Remove old debug script.
Update dump script to also dump meta.
Update readme.
Update simple example.
Add tree structure example.
Update basic tests.
Merge branch 'streams2'
Bump version: v0.6.0