only display expand/collapse class and disclose span when tree node has children
Revert changes in jquery.mjs.nestedSortable.js

Since this is a vendor js it shouldn't be modified here
Shorter if syntax
Merge pull request #25 from 'zarazan-master'
Add lightweight specs using MiniTest

These specs are to be a basis for testing future functionality without
the added complexity of building out a full Rails application to perform
integration testing.
Setup `rake test` and default rake task to perform tests
Add minitest as a dev dependency.