Use column and argument names from WMATA

[k5cents]

Instead of using custom argument names and giving the return data custom column names, just use the names expected and returned by the API (e.g., full camel-case StopID instead of minimal snake-case stop).

• [x] Bus Route and Stop Methods
• [x] Incidents
• [x] Misc Methods
• [x] Rail Station Information
• [x] Real-Time Bus Predictions
• [x] Real-Time Rail Predictions
• [x] Train Positions