The Ring SPEC says that the :body of a request can be nil. Handle this
as well.
Merge pull request #9 from r0man/optional-body

Handle optional :body of request.
preparing stable release 0.2.4
bump version to 0.2.5-SNAPSHOT
Improve formatting of docstrings.
Merge pull request #10 from Raynes/master

Improved docstring formatting
added custom error handling
better handling of errors for format-params
added some missing typehints
created the format namespace and pickable formats list
added :json-kw format and fixed bugs
updated docstrings
better doctring
Merge remote-tracking branch 'refs/remotes/origin/master'

Conflicts:
	src/ring/middleware/format_params.clj
partial update README
prefer sending back default encoded response than exception
use clojure.tools.reader for edn
added :yaml-kw format
updated changelog and version
fix changelog format