[jingai]

Pull Request #100 adds in support for the RandomItems and Watchlist scripts for the Movies, TV Shows, and Music sections. As well, it adds support for RecentlyAdded albums in the Music section. This takes care of Issue #32.

I have not yet added in the option to select a different script for each of the sections. I'll get that done by the end of this week, but I wanted to go ahead and push up these changes so folks here could test it this week. I'm going away on vacation next week and will have limited internet access, so I'd like to squash any new issues my changes might have created ASAP.

I chose to require a restart of XBMC if the user changes between the three scripts (and added a notice saying as much in the Settings dialog). I decided on this because both the RandomItems and Watchlist scripts can be quite slow on large libraries (especially when using a centralized database via MySQL), so I didn't think it was a good idea to unconditionally run them at startup, as a lot of people run XBMC on resource-limited machines. If it turns out this behavior is undesirable, it's easily changed later, however.

Also, you may close Issue #17 if you're satisfied with my patch for it.