Add link to Responsive compilers - Nicholas Matsakis - PLISS 2019 somewhere?

[spastorino]

Just saw this talk https://www.youtube.com/watch?v=N6b44kMS6OM by Niko and I was wondering if we should include it in the guide. In general we could also have a talks section which are sometimes more entertaining than reading stuff.

cc @mark-i-m

[mark-i-m]

Also a great talk: https://www.youtube.com/watch?v=LIYkT3p5gTs

[JohnTitor]

Sounds good! Is https://rustc-dev-guide.rust-lang.org/appendix/compiler-lecture.html one of the good places? (That's more of "rustc Lecture Series" than "Compiler Lecture Series", though.)

[spastorino]

Another two from @pnkfelix ...

Felix Klock - Rust: A type system you didn't know you wanted - Curry On
Felix Klock - Subtyping in Rust and Clarke's Third Law