Remove completed items from TODO
Remove FIXME about backend dependent string escaping, as we only have to support Postgres
Merge branch 'master' into pgtypes
Remove FIXME about a Monoid instance since I want to keep things simple for now
Marginally increase typesafety by storing the tag as a separate field in Symbol
Merge appendShow into tagWith
Merge branch 'master' into pgtypes

Conflicts:
	Opaleye/Internal/Sql.hs
	Opaleye/Operators.hs