Add method to MotorErrors.java to check if a CANSparkMax is currently overheated

[FriedLongJohns]

Unfortunately I don't think anyone wants to read this, so I left the method as multiple lines.

public static boolean isSparkMaxOveheated(CANSparkMax spark){return spark.getMotorTempurature > spark.TemperatureLimits.get(spark.getDeviceId());}

[CoolSpy3]

This is the right idea, but it could be affected by the same bug mentioned in #37. Take a look at the code added in #41. It would also be nice to have methods which accept both the CANSparkMax object as well as its CAN id.

The PR does no harm and can be easier than searching log files for the warnings. Further improvements can be made in future PRs.