reviewed readme and todo
Merge branch 'ro_dev'
corrected md
Add Travis status on master only
Merge branch 'master' into pluginRefactory
correct wrong return in mongo plugin + lint
	modified:   libnmap/plugins/backendplugin.py
	modified:   libnmap/plugins/mongodb.py
added basic rst doc for s3 plugin. fixme: complete doc and example
lintage os S3
Merge remote branch 'origin/pluginRefactory' into pluginRefactory
Removed harcoded value of S3.py, + correct a few things + cleanup
Tested on Amazone S3 OK
	modified:   libnmap/plugins/s3.py
	modified:   libnmap/plugins/sql.py
	modified:   libnmap/test/test_backend_plugin_factory.py