conpaas: fix pep8.
Documentation for autoscaling API.
Cleaning the list of autoscaling strategies and its documentation.
Documented the arguments of add_nodes and added more checks on arguments.
Using default value with dict.pop(key [, default]).
Added autoscaling support for the command line client.
Re-display the autoscaling section in the PHP service page.
Fixed passing strategy argument for autoscaling on command line client.
More information in trace logger.
Bug fix: cloud is not a string here.
Bettering logging trace.
conpaas doc: documentation for autoscaling using the command line cpsclient.py.
conpaas: pep8 conformance for autoscaling code.
conpaas: forward error message.
conpaas: add autoscaling commands to cps-tools.