Clean up plugin READMEs and a few plugins

- fasd
- history
- mercurial
- pylint
- repo
- yii2

plugins/lighthouse/README.md

@@ -16,7 +16,8 @@ plugins=(... lighthouse)
   file in your directory with the URL to the individual project.
 
   Example:
-  ```zsh
+
+  ```console
   $ cat .lighthouse-url
   https://rails.lighthouseapp.com/projects/8994
 
@@ -24,3 +25,5 @@ plugins=(... lighthouse)
   Opening ticket #23
   # The browser goes to https://rails.lighthouseapp.com/projects/8994/tickets/23
   ```
+
+See a demo: http://screencast.com/t/ZDgwNDUwNT