changed __repr__ NmapReport
changed __repr__ for NmapReport.
added new key support in NmapReport diff (commandline, version, elapsed, scan_type)
NmapProcess inherit from Thread. fixme: inherit from Process

- libnmap.process pylinted
- added process documentation
- added diff documentation
- removed content from build dir
Merge branch 'ro_dev'
	modified:   objects.py
	modified:   test/test_backend_plugin_factory.py
Merge remote branch 'origin/master' into pluginRefactory
Finalise test + add docstring + correct bug in plugins mongo&sql
	modified:   ../plugins/mongodb.py
	modified:   ../plugins/sql.py
	modified:   test_backend_plugin_factory.py