docs: add link to and fix custom formatters doc

README.md

@@ -47,6 +47,7 @@ $ npm install cucumber
 ## Documentation
 
 * [CLI](/docs/cli.md)
+* [Custom Formatters](/docs/custom_formatters.md)
 * [NodeJs Example](/docs/nodejs_example.md)
 * Support Files
   * [World](/docs/support_files/world.md)

docs/custom_formatter.md → docs/custom_formatters.md

@@ -2,7 +2,7 @@
 
 Custom formatters should be a javascript class. The constructor will be an options object  which is the options defined with `--format-options` and the following:
 
-* `colorFns`: a series of helper functions for outputting colors. See [here](/src/formatters/get_color_fns). Respects `colorsEnabled` option
+* `colorFns`: a series of helper functions for outputting colors. See [here](/src/formatter/get_color_fns.js). Respects `colorsEnabled` option
 * `cwd`: the current working directory
 * `log`: function which will write the passed string to the the designated stream (stdout or the to file the formatter output is being redirected to).
 * `snippetBuilder`: an object with a `build` method that should be called with a [step](/src/models/step.js) to get the snippet for an undefined step