Saving bug

[worthant]

My logic works like this:

• When saving executed, program executes INSERT statement, but in psql it just ADDS new objects to database. And i just collect EVERYRTHING. That's really really bad

[worthant]

fixed this by adding 2 separate logic commands:

• writeObjectToDatabase - adds 1 new object to database
• writeCollectionToDatabase - adds objects from collection to database ONLY if they aren't there already.