First Commit

Modified the README file.
Added "S3Importer" folder containing:
- S3Importer.py (ingestion software for Spoke 3 WP4);
- S3Importer_conf.json (configuration file for tangoclip jclip for S3Importer);
- ingestion_datamodel.sql (datamodel used by the S3Importer in the Spoke 3 WP4).
Added "services" folder containing:
- services.py (Flask app to expose the GaiaMerger service);
- services.conf (Apache site configuration file);
- gaia (Folder);
- gaia/gaiamerger.py (GaiaMerger service endpoint main script).
Added "tangoclip" folder containing:
- aclip.py (command line interface in python for Tango Astor functionalities);
- atclip.py (command line interface in python for Tango ATK functionalities);
- jclip.py (command line interface in python for Tango JIVE functionalities).