README.md in tree_graph-0.1.1 vs README.md in tree_graph-0.2.0

- old
+ new
@@ -18,24 +18,11 @@
 
     $ gem install tree_graph
 
 ## Usage
 
-In Node class, `include TreeGraph`, then implement `parent_for_tree_graph`, `label_for_tree_graph`, `is_last_for_tree_graph`, you get `tree_graph_level`. To have `tree_graph`, also implement `children_for_tree_graph`.
+In Node class, `include TreeGraph`, then implement two methods, `label_for_tree_graph` and `children_for_tree_graph`(which return thing responds to `each`). Then you can call `tree_graph` on that Node object.
 
-Gems depending on this: [constree](https://github.com/turnon/constree), [trace_tree](https://github.com/turnon/trace_tree).
+Or checkout [test/tree_graph_test.rb](https://github.com/turnon/tree_graph/blob/master/test/tree_graph_test.rb) to see how to use.
 
-## Development
-
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
-
-To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
-
-## Contributing
-
-Bug reports and pull requests are welcome on GitHub at https://github.com/ken/tree_graph.
-
-
-## License
-
-The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
+Gems depending on tree_graph: [constree](https://github.com/turnon/constree), [trace_tree](https://github.com/turnon/trace_tree).
 