Add dependency from PyCLI package in setup.py
rename `region` to `ec2_region` configuration option
Rename cmd.py in order to avoid conflicts with another module
Set verbosity level depending on the number of `-v` given from command line
Add newline at the end of the file
Add comments con Cluster class
Fix bug causing the program to loop forever...
Add comments + beautification + do not assume port is an integer (could be empty)
Add comments