Add #5 to CHANGELOG and Update README.md [ci skip]

Author: JuanitoFatas

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Generate line numbers via `line_numbers` option in context hash [#5](https://github.com/JuanitoFatas/html-pipeline-rouge_filter/pull/5) by @lowjoel
+
 ## 1.0.2 - 2015.08.06
 
 - Allow to use with `HTML::Pipeline` >= 1.11 [#3](https://github.com/JuanitoFatas/html-pipeline-rouge_filter/pull/3) by @townsen

README.md

@@ -58,6 +58,9 @@ Prints (without the linebreaks):
 </pre>
 ```
 
+You can specify line numbers via `line_numbers` option in
+[context](https://github.com/jch/html-pipeline#examples) hash.
+
 ## Contributing
 
 1. Fork it ( https://github.com/juanitofatas/html-pipeline-rouge_filter/fork )