Several plugin and documentation updates

In software — I updated a few plugins and/or their documentation:

• BlogPulse link, v.2.1 (obsolete)
• Cosmos link, v.2.1 (obsolete)
• Dofollow, v.2.0
• Fancy excerpt, v.2.5
• Frame buster, v.3.3
• Unfancy quote, v.2.0