class init commit
igobject added
Merge branch 'IGObjectTest' of
https://github.com/lab712-kao/pre_TowerDefender.git into IGObjectTest

Conflicts:
	src/gameObject/tower/IGObject.java
complete IGMoveObject
IG series
Merge branch 'IGObjectTest' of
https://github.com/lab712-kao/pre_TowerDefender.git into IGObjectTest

Conflicts:
	src/gameObject/tower/IGMoveObject.java
Merge remote-tracking branch 'origin/IGObjectTest'

Conflicts:
	src/gameObject/tower/IGObject.java