Conversion between celsius and fahrenheit

I saw that there are already a couple of issues about this. But in all of them the conclusion seems to be "just use `fahrenheit(from_celsius(x))`" and I feel like that's a bit lame. 80% of my unit conversions in day to day life are between C and F, and I want those to be simple and easy to type. I want to be able to type `42 C to F` like with any other units. It's weird that "unix seconds" have first-class support but not the two most common temperature units. The main reason I was excited to try this calculator was that the unit conversions seemed so slick, and I was incredibly disappointed to try `42 C to F` and have it not work.