v0.5.0

Change log:

• Lifted transformers (#146), including chimney-cats integration module for cats.data.Validated
• Brand new, Sphinx-based documentation (#143), available at https://scalalandio.github.io/chimney/
• Disallow method accessors by default (#148)

Thanks to @ulanzetz, @jatcwang, @MateuszKubuszok and others who made this release possible.