Setup Basic ServerConnection.cs

[jasmine-bae]

Make sure to close issue when you have completed this task!

[erwang01]

• AddDrone() method.
• Test AddDrone method.
• Service calls and callbacks as defined in our API document.
• Implement subscribers and logic to parse and update drone positions.

[erwang01]

Status Update 10/3: Skeleton is down.

Stateless Server Connection.

[jasmine-bae]

Completed (@Peru)

• Attach to world properties
• Create ros variable instance with the server connection
• Basic setup for the service calls
• Add GetAllDrones service call