feature: Allow single object children

I.E. not wrapped in an array

Fixes ivantage/angular-ivh-treeview#5
feature: Allow single object children

I.E. not wrapped in an array

Fixes iVantage/angular-ivh-treeview#5
Merge remote-tracking branch 'origin/feat.obj-as-root' into feat.obj-as-root
chore: Undo changes to dist files
Merge pull request #6 from jtrussell/feat.obj-as-root

feature: Allow object tree roots (unwrapped single children)