Add jspahrsummers/objc-build-scripts
Move old scripts into script/
Update build script paths in Xcode project
Set default targets in cibuild script
Remove now-invalid unit tests

See 540dd95d31e6a2ac939033b052607c907ea97936.
Remove unused Tests schemes
Enable build actions for ObjectiveGit-iOS scheme
Add jspahrsummers/xcconfigs
Whip these project settings into shape with xcconfigs
Remove unused, warning-filled base64 code
Fix warnings in unit tests
Add missing Run Script phase for running unit tests
Fix header search paths for iOS
Merge pull request #164 from libgit2/project-cleanup

Project cleanup, fix unit tests