March, 2020
	(1) fixed the dependency issues on rTensor
	(2) revised documentations
	(3) fixed the dependency issue on orphaned package: clue
	(4) fixed "No protocol specified" problem

September, 2020
	(1) removed redundant packages
	(2) renamed the functions to more informative names
	(3) revised documentations 
	(4) fixed "'rgl.init' failed" warning