Add test to NamedHoasUsage
Experiment with quasiquotes
Upgrade macro-paradise dependency
Add comments
Upgrade to scalamacros/paradise 2.0.0-M3

Also, add new needed extra dependency.

Reason: this fixes scalamacros/paradise#11.
Merge branch 'topic/still-with-quasiquotes'

I've not merged quasiquotes back into Macros.scala,
but that will require some inventive, so it better be a separate commit.
(I moved the quasiquote-based code into a comment for now).

Conflicts:
	NamedHoasUsage.scala
	build.sbt
	macros/Macros.scala