added all structured in the __all__ metavar
new method for connect and testing the connection errors
Merge branch '2.0.0' of github.com:cr0hn/golismero into 2.0.0

Conflicts:
	plugins/testing/scan/openvas_lib/data.py
added to the plugin the resposibility of the delete the scan and the target
Working in process: when try to receive the information, the SSL connection breaks. Some times, the connection not breaks but, if want to close the xml document, xml information is not correctly formed (because there is more information to receive) and the parser breaks