Whenever I check in changes to my OS X app Xcode 4 projects into git, a lot of lines of files like these get changed with practically every commit
.../UserInterfaceState.xcuserstate | 3927 ++++++++++++++++++++
.../test.xcuserdatad/xcschemes/Deployment.xcscheme | 72 +
.../test.xcuserdatad/xcschemes/Hush.xcscheme | 76 +
.../xcschemes/xcschememanagement.plist
Is this stuff necessary to put under version control? The changes to *.xcuserstate clutter up the output of git log -p so much.