Get useful keys from JSON data dump

[MaxwellRosales]

Scan through example_status.pdf to get json keys for useful data that needs to be recorded and comment them in this issue.

Stuff to record:

• RSSI

[ErnestoSihombing27]

Stuff to record:

• RSSI from "Sta"
• RSSI from "Remote"
• Signal from "Sta"
• Signal from "Remote"
• TX Bytes & RX Bytes from "Sta"
• TX Bytes & RX Bytes from "Remote"

I think that's it for now, thanks!

[MaxwellRosales]

Commit aed9428187806585691c8b5dd4c9abc229180693 should fix this. Note that I did not test if the code indexes the dictionary correctly.