ReactiveX/Rx.rb — pull request #29 by jca02266 (2014-12-09 15:34:21+00:00)
Title: Cannot work core_ext/enumerable.rb

I have fixed core_ext/enumerable.rb to work the below script.

```ruby
$: << './lib'

require 'rx'
require 'core_ext/enumerable.rb'

sub = [4, 5, 6].to_observable
.select {|x| x.even? }
.map {|x| x * x }
.subscribe_on_next {|x| puts x.to_s }
```