Improve templating ergonomics #11

Currently the way you create templates using the $ helper is fairly strict and limited.

For example this does not work:

($ :div "hello world")

You'd have to do this instead:

($ :div
  ($ "hello world"))

I'd like to make this better by allowing any item inside a $ to be allowed, with clever enough heuristics to recognize sequences and know what to do with them.