Implemented Image and Flavour options management in main.
Improved method to show the list of available images.
Improved flavours display format.
Improved securitygroups options in command line.
Modified version of argparse. In this version the subparsers are not
mandatory.
Now we're using the argparse modified version, this way, the subparsers
are not mandatory and avoid the too few arguments error.
Minor bugfixes.
Reimplemented get_security_group function
Improved security group management in main
Improved keypairs options and main management.
Merge branch 'clialt'
Deleted argparse file not needed. New version of cli. We don't use
subparsers.
Conflicts:
	launcher/cli.py
Implemented list options in main
Improved list options management
Improved launch_virtual_machines function with all parameters needed.
Added name parameter to cli. Improved main function with management of all parameters needed and launch images section.
Added version parameter to command line.
Added list of modules.
Installation file.
Added insecure option to command line.
Improved version option in command line. Now we return the parser
instead of the arguments parsed. This way we can call the print_help()
method of the parser if no arguments are passed to the program.