Prototype DB Querries

[tstrat]

Create some basic queries and test the functionality.

This will be transferred into files in the db folder of the project later.

• Get all monsters in an encounter
• Get the url of a specific monster? -- may not need instead get all values and do it on front-end
• Get all encounters from a user
• Add user
• Add encounter for a user
• Remove encounter for a user (specified by id)
• Insert a monster into a specific encounter
• Remove monster from a specific encounter