Reads battery voltage and prints to Serial
Defined the pin as a macro, in accordance with our other pin declarations
Corrected error in printing the reading as a double; the Arduino cannot print a double correctly, therefore it has to be converted to string first using dtostrf function
Updated the increments of voltage to be properly calculated as 5.0/1024
Added second voltage reader, but the voltage readers aren't correctly reading; not sure if this is an arduino or software issue. Need to look into this further
Merge pull request #1 from UBCSailbot/Battery_Voltage_Reader

Battery voltage reader