quote various comment tags that weren't rendered

parts of the Comment section weren't being rendered properly as the 
xml tags that were being described were not quoted.

Author: nikr

README.md

@@ -240,9 +240,9 @@ Example:
 ```
 28. Always apply C# comment-blocks (///) to public, protected, and internal declarations.
 29. Only use C# comment-blocks for documenting the API.
-30. Always include <summary> comments. Include <param>, <return>, and <exception> comment
+30. Always include <summary> comments. Include `<param>`, `<return>`, and `<exception>` comment
 sections where applicable.
-31. Include <see cref=””/> and <seeAlso cref=””/> where possible.
+31. Include `<see cref=""/>` and `<seeAlso cref=""/>` where possible.
 32. Always add CDATA tags to comments containing code and other embedded markup in order to avoid
 encoding issues.
 Example:
@@ -252,7 +252,7 @@ Example:
 /// <code><![CDATA[
 /// <configuration>
 /// <appSettings>
-/// <add key=”mySetting” value=”myValue”/>
+/// <add key="mySetting" value="myValue"/>
 /// </appSettings>
 /// </configuration>
 /// ]]></code> >