Prove (again, from scratch) that n + 0 = n

I had this lying around.
Import Agda tutorial

This is the "Brutal [Meta]Introduction to Dependent Types in Agda".
Add example of mixfix ambiguity

This was written live together with Tillmann, when he was showing me why
mixfix operators can cause parsing ambiguities which cannot be fixed
with parentheses.
Add Agda model of a paper

These are my attempts to follow McBride's paper "Outrageous
but Meaningful Coincidences ─ Dependent type-safe syntax and
evaluation".
Update .gitignore