Server protocol

1. When the mapepire-server is started, it opens a websocket at wss://<db2ServerHostname>:8076/db/ and listens for connections.

2. The client calls connect either directly with an instance of the SQLJob class or indirectly using the init method of the Pool class to initiate a connection with the server.

3. Calling the execute method of the SQLJob, Query, or Pool class will send a query object to the server with the following format:

   {
       id: string
       type: string
       sql: string
       cmd: string
       terse: boolean
       rows: number,
       parameters: any[]
   }

4. The server responds by sending back a message to the client with the corresponding query id, and some associated information. Ex.

   {"id":"query12","has_results":true,"update_count":-1,"metadata":{"column_count":1,"job":"057235/QUSER/QZDASOINIT","columns":[{"name":"00001","type":"VARCHAR","display_size":28,"label":"00001"}]},"data":[{"00001":"057235/QUSER/QZDASOINIT"}],"is_done":true,"success":true}

5. The socket connection can be closed by calling the close method if the SQLJob or Query class was being used or the end method if the Pool class was used.