add fbterm

Plugins.md

@@ -259,6 +259,10 @@ This is a plugin that helps to encode/decode strings with base64 from the consol
 
 * fab - completion plugin for [fabric](http://docs.fabfile.org/en/1.2.2/index.html)
 
+## fbterm
+
+* fbterm - automatically start fbterm when running in /dev/tty*
+
 ## Forklift
 
 **Maintainer:** [bitboxer](https://github.com/bitboxer)