Add DbSchema database tool.

[dprutean]

DbSchema is a MongoDb and database tool with ER diagrams, relational data browse and query builder. The user can explore MongoDb collections as entities in the diagram, each subdocument in a separate entity. The query builder can generate queries with .find(), .aggregate(), etc. In the diagram can be created virtual foreign keys. Using the the user can explore the data from each collection and subdocument in a separate browse frame, jump between subdocuments, collecitons, etc.