Addressing Inch CI's suggestion

Lotus::Action.load!

> * Describe what "Application.load!" returns.
> * Describe the parameter "recipient".

http://inch-ci.org/github/lotus/lotus

Also changing parameter name from recipient to application to suggest
the context of the parameter.
Adding a some documentation to Environment

The methods of Lotus::Environment are somewhat self-evident.
Merge pull request #76 from jeremyf/improving-documentation

Improving documentation