add
delete old square
Merge branch 'recording_phase' of github.com:zhangchi8620/Multi-Robot-PbD into recording_phase

Conflicts:
	Codes/GMM_GMR_v2.0/data/wiping/demo_1
	Codes/GMM_GMR_v2.0/data/wiping/demo_2
	Codes/GMM_GMR_v2.0/data/wiping/demo_3
	Codes/GMM_GMR_v2.0/data/wiping/demo_4
delete old