LispParser: prune code killed by string refactor.
LispParser: More monad refactorings
LispParser: Experimenting with better error messages.
LispParser: Helper to parse files.
LispParser: Having a go at comments
LispParser: Plumbing in the comments.
LispParser: added whole-file parser.
LispParser: Make comments handle newlines less brokenly.
LispParser: Don't re-invent parseFromFile.
LispParser: More error messages, and comments bits.
LispParser: Comments refactor. My .gnus now parses!