Handle multiple keys for each folds evaluation
Option to output valid JSON from dump
New option to reverse pointers and slices in dump -m

Now dump -mrj might be useful input to a JavaScript/HTML renderer
Show fields description for __meta__ in dump -m
Reverse __meta__ pointers in dump -mr
Rename folds to split
Update version to 1.1
Merge remote-tracking branch 'origin/master' into py3k