Add Reference to IMAGE_DIFF_DIR (#201)
Add Reference to IMAGE_DIFF_DIR (#201)


peacemoon/ios-snapshot-test-case,material-foundation/ios-snapshot-test-case,material-foundation/ios-snapshot-test-case,facebook/ios-snapshot-test-case,material-foundation/ios-snapshot-test-case,peacemoon/ios-snapshot-test-case,Nuglif/ios-snapshot-test-case,Nuglif/ios-snapshot-test-case,Nuglif/ios-snapshot-test-case,material-foundation/ios-snapshot-test-case,onemedical/ios-snapshot-test-case,peacemoon/ios-snapshot-test-case,facebook/ios-snapshot-test-case,facebook/ios-snapshot-test-case,onemedical/ios-snapshot-test-case,onemedical/ios-snapshot-test-case