Update README.md

example json was invalid
Merge pull request #13 from maldoinc/patch-1

Update README.md
Merge branch 'selectable-node-config' of https://github.com/tbaron/bootstrap-treeview
Merge branch 'empty-icon-config' of https://github.com/tbaron/bootstrap-treeview into tbaron-empty-icon-config
Added expandCollapseIcon to encapsulate expand collapse and empty icons.  Fixes issue with indentation/alignment.
Merge branch 'tbaron-empty-icon-config'
Bower update, support for jQuery >= 1.9.0