Remove xcode and input/output files
Merge branch 'master' of https://github.com/gmarcotte/usaco

Conflicts:

usaco.xcworkspace/xcuserdata/gmarcotte.xcuserdatad/UserInterfaceState.xc
userstate

usaco.xcworkspace/xcuserdata/gmarcotte.xcuserdatad/xcdebugger/Breakpoint
s_v2.xcbkptlist