A very rough stab at switching to Text.
Renamed failing to failed for lens 3.10 compatibility
Merge branch 'master' of github.com:ekmett/trifecta into text

Conflicts:
	src/Text/Trifecta/Rope.hs
	trifecta.cabal
Merge branch 'text' of git://github.com/ekmett/trifecta

Conflicts:
	src/Text/Trifecta/Parser.hs
	trifecta.cabal