renamed:    lib/pyutils/ext/__init__.py -> lib/pyutils/amazon/__init__.py
	renamed:    lib/pyutils/ext/ec2.py -> lib/pyutils/amazon/ec2.py
	renamed:    lib/pyutils/ext/latex.py -> lib/pyutils/amazon/latex.py
	deleted:    lib/pyutils/cluster/copy.py
	modified:   lib/pyutils/cluster/ssh.py
	modified:   lib/pyutils/system/command.py