Define and export Markdown type to use with format= in makedocs. (#3)

Add CHANGELOG.md.

CHANGELOG.md

@@ -0,0 +1,31 @@
+# DocumenterMarkdown.jl changelog
+
+## Version `v0.2.0`
+
+* ![Enhancement][badge-enhancement] Now defines and exports the `Markdown` type
+  which should be passed to Documenter's `makedocs` as `makedocs(format = Markdown(), ...)`
+  for specifying Markdown output ([#3][github-3]).
+
+## Version `v0.1.0`
+
+* Initial release.
+
+
+[github-3]: https://github.com/JuliaDocs/DocumenterMarkdown.jl/pull/3
+
+
+[badge-breaking]: https://img.shields.io/badge/BREAKING-red.svg
+[badge-deprecation]: https://img.shields.io/badge/deprecation-orange.svg
+[badge-feature]: https://img.shields.io/badge/feature-green.svg
+[badge-enhancement]: https://img.shields.io/badge/enhancement-blue.svg
+[badge-bugfix]: https://img.shields.io/badge/bugfix-purple.svg
+
+<!--
+# Badges
+
+![BREAKING][badge-breaking]
+![Deprecation][badge-deprecation]
+![Feature][badge-feature]
+![Enhancement][badge-enhancement]
+![Bugfix][badge-bugfix]
+-->

README.md

@@ -17,13 +17,13 @@ pkg> add DocumenterMarkdown
 
 ## Usage
 
-To enable the backend import the package in `make.jl` and then just pass `format = :markdown`
+To enable the backend import the package in `make.jl` and then just pass `format = Markdown()`
 to `makedocs`:
 
 ```julia
 using Documenter
 using DocumenterMarkdown
-makedocs(format = :markdown, ...)
+makedocs(format = Markdown(), ...)
 ```
 
 [documenter]: https://github.com/JuliaDocs/Documenter.jl

REQUIRE

@@ -1,2 +1,2 @@
 julia 0.7
-Documenter 0.20
+Documenter 0.21

src/DocumenterMarkdown.jl

@@ -2,6 +2,9 @@ module DocumenterMarkdown
 
 using Documenter
 
+const Markdown = Documenter.Writers.MarkdownWriter.Markdown
+export Markdown
+
 function __init__()
     if !isdefined(Documenter.Writers, :enable_backend)
         @warn """Incompatible Documenter version.