GitLab

Aims:
- cleaner cli load-point code
- move more argument logic to argument module
- move command loading to the seperate service cli modules:
    each command spec module will provide a mechanism for loading
    command interfaces (all of them or specific cmds)

FEATURE: subcommands of a callable command are not allowed. e.g.:

if the following exist as callable commands:
cmd1_cmd2
cmd1_cmd2_cmd3

then cmd1_cmd2 is resolved, but cmd1_cmd2_cmd3 is not

UNFIXED: There is still a case of syntax-error or --help call where the best
possible help message is not resolved:

cmd1_cmd2_cmd3 where cmd1_cmd2 is not a command

CLI bug: deep-level commands malfunction

wait for server to reach state (e.g. while building)

KeyValueArgument now accepts only one key=value pair but can be
repeated:
    --property key1=val1 --property key2=val2

CmdCondigArguemtn sets global prefix by default
    -o account=user@domain.org
is now equivalent to
    -o global.account=user@domain.org

minor unitest fixes

In pithos download/upload ctrl-c is caught when multithreading,
and wait for active threads to finish before exiting

gevent depedency is not needed after that

cat prints a remote file to console
this used to be achieved by calling download with only one
parameter, which is not supported anymore

Conflicts:
	kamaki/__init__.py
	kamaki/cli.py
	kamaki/clients/__init__.py
	kamaki/clients/astakos.py
	kamaki/clients/compute.py
	kamaki/clients/cyclades.py
	kamaki/clients/image.py
	kamaki/clients/pithos.py
	kamaki/clients/storage.py
	kamaki/config.py
	kamaki/utils.py
	setup.py