README.md in jekyll_github_sample-0.2.0 vs README.md in jekyll_github_sample-0.3.0

@@ -3,11 +3,11 @@
 
 Two Jekyll Liquid tags to display a code sample from a file in a public Github repo and provide a reference to it.
 
 # Install
 
-- First add the gem to your `Gemfile` 
+- First add the gem to your `Gemfile`
 ```
 gem 'jekyll_github_sample'
 ```
 - `bundle` to install the gem
 - Add the gem to your Jekyll `_config.yml`
@@ -28,10 +28,20 @@
 
  * URL_WITH_USERNAME_REPO_AND_FILE - the relative path to the Github repo file, prefer a file with the commitish in it so it won't change when recompiling occurs. A url to this README would be: `bwillis/jekyll-github-sample/blob/a3bc9e82412d364aa76e9308ab53ff2bddaa2faf/README.md`
  * START_LINE_NUMBER - (optional) number that is the first line to include (0 based)
  * END_LINE_NUMBER - (optional) number that is the last line to include, if excluded will read to end of file
 
+One can also specify the lines to include based on markings in the file itself.
+This is done by invoking
+
+```
+{% github_sample URL_WITH_USERNAME_REPO_AND_FILE tag:TAG_NAME %}
+```
+
+and placing the strings `[START TAG_NAME]` and `[END TAG_NAME]` anywhere in the lines immediately before and after the content you wish to include.
+
+
 # github_sample_ref Usage
 ```
 {% github_sample_ref URL_WITH_USERNAME_REPO_AND_FILE %}
 ```
 
@@ -51,8 +61,9 @@
 # Thanks!
 
 Thanks to all those who have helped make this really awesome:
 
 * [heedfull](https://github.com/heedfull)
+* [robertwb](https://github.com/robertwb)
 
 # License
 Jekyll Github Sample is released under the MIT license: www.opensource.org/licenses/MIT