Add a few more weird and wonderful chars

[jafingerhut]

#inst, #uuid & #js etc. - tagged liters - should add this to cheat sheet
>!! <!! >! <! - core.async channel macros - should add

[jafingerhut]

Tagged literals were added with this commit: jafingerhut@b13a99e

Still no core.async macros in the cheat sheet yet, so leaving this open to consider that.

[jafingerhut]

core.async channel macros were added with this commit: jafingerhut@9984a7e

Closing this issue as resolved now.