Changes in recent Tesla updates

Here I record all the notable changes I found in my last three updates. 2018.42, 2018.48 and 2018.49.20 (I don't call it out but the only changes in the last one is if autopilot fails to engage in normally will turn off cruise again where in on of the two mentioned it would just set cruise and still display the message that autopilot isn't engaged.) 

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Tesla referral program, another early deadline

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Tesla Defroster