.gitignore .svnignore etc

I'm curious what folks have in their .gitignore file particularly for the "Builds" directory (for my JUCE based project). Apparently, I have important files in there, but a whole lot that aren't.

I just used the Visual Studio template that GitHub provides with a couple of minor additions based on using the Juce demo plugin host for debugging and a 64bit build (see https://github.com/bcmodular/scopesync/commit/8cdb5e92585f5cf321068c0fa4fad443dbc919a5)