It's pretty hard to make a lexer using Data.Text

Although the parser is rather easy to use to export `Text` from `Data.Text`, the `Text.Parsec.Token` library is rather hard to use to create a lexer using `Text`.

I'm not exactly sure how to make the change as of yet -- I'd love to be guided into making the change -- but it would be wonderful if we could somehow parameterize either `makeTokenParser` or `emptyDef` so that it would be easier to create a lexer that can handle to the `Text` type rather than the `String` from `Prelude`.

I would love for someone to correct me if I'm wrong and this is doable with the current libary, but at the same time I feel that it could potentially be a reason someone might look somewhere else. Perhaps having an easy way of creating a `Text` consuming lexer could be a boon to `Parsec`.