Added environment panel for depth, pressure and outside temperature.

docs/TODO.md

@@ -1,20 +1,13 @@
 To do:
 
-- Pitch/yaw/tilt relative to magnetic north
 - Motor information
   - RPM
   - Torque
   - Power Consumption
-- Overall power consumption
 - Command line
 - Inputs
 - Camera Status
 - VR Peripherals and ROV connection status
-- Uplink/Downlink Data Rate
 - Manipulator Pos/Rot
   - 3D model of arm rotation
-- Status
 - Logging
-- Enclosure Temperature
-- Depth (Pressure)
-- Tether Latency