Update Tutorial-Record-ID.md
Update Tutorial-Record-ID.md

- Added an introduction and conclusion.
- I think the figures regarding the limit of possible records was miscalculated, so I changed that.
- Also, updated the console demo to reflect style from the latest version of OrientDB. 
- Finally added a demo on accessing a record by RID look-up with Studio.
orientechnologies/orientdb-docs,smolinari/orientdb-docs