CSharp
Features
* Add `environment` property to config created with `ForEnvironment` - [63](https://github.com/ResourceDataInc/Centroid/pull/63)
* Deep merge support - [56](https://github.com/ResourceDataInc/Centroid/pull/56)
* Add `ContainsKey` method - [50](https://github.com/ResourceDataInc/Centroid/pull/50)
Fixes
* Fix issue opening project in Xamarin Studio - [49](https://github.com/ResourceDataInc/Centroid/pull/49)
* Fix issue with lowercase `all` environment not being picked up - [54](https://github.com/ResourceDataInc/Centroid/pull/54)
* Fix issue with enumerating over config values causing values to become non-Centroidy - [60](https://github.com/ResourceDataInc/Centroid/pull/60)
Python
Features
* Add `environment` property to config created with `for_environment` - [63](https://github.com/ResourceDataInc/Centroid/pull/63)
* Deep merge support - [56](https://github.com/ResourceDataInc/Centroid/pull/56)
* Add `__contains__` support - [50](https://github.com/ResourceDataInc/Centroid/pull/50)
Fixes
* Fix issue with enumerating over config values causing values to become non-Centroidy - [61](https://github.com/ResourceDataInc/Centroid/pull/61)
Ruby
Features
* Add `environment` property to config created with `for_environment` - [63](https://github.com/ResourceDataInc/Centroid/pull/63)
* Deep merge support - [56](https://github.com/ResourceDataInc/Centroid/pull/56)
* Add `has_key?` method - [50](https://github.com/ResourceDataInc/Centroid/pull/50)
Fixes
* Fix issue with enumerating over config values causing values to become non-Centroidy - [61](https://github.com/ResourceDataInc/Centroid/pull/61)
* Fix issue with enumerating arrays causing values to become non-Centroidy - [53](https://github.com/ResourceDataInc/Centroid/pull/53)