Added a Rich Snippet builder.

https://support.google.com/webmasters/answer/185417?hl=en
Signed-off-by: Michael Reiner <mreiner77@gmail.com>
Updated RichSnippetBuilder.php

Signed-off-by: Michael Reiner <mreiner77@gmail.com>
Updated class name

Signed-off-by: Michael Reiner <mreiner77@gmail.com>
Restoring RichSnippet class name

Signed-off-by: Michael Reiner <mreiner77@gmail.com>
Rich Snippet builder class name needs to be `Richsnippet`

Signed-off-by: Michael Reiner <mreiner77@gmail.com>
Merge pull request #6 from radarseven/master

Added a Rich Snippet builder.