Confluence Addon Shortcuts To Support Scirpts

This patch will enable addons that implement both Script and Plugin support to be able to be called from a shortcut.  Since a change in Gotham the plugin will always be called.

Discussion on the following thread:

http://forum.xbmc.org/showthread.php?tid=197232

This patch works by detecting that the addon is a script.* and runs as a script (as this is it's primary purpose) and if it is a plugin.* then it will run as a plugin