text body parser works.
The format of the parsers has degraded. I don't like the inability to deal with the exception manually, although a standard exception would be nice.
Much better BodyParser impl
Make things better, imo.
Use character set from the request.

The UTF-8 default is bad when the request specifies its own character
set.  We could refer to the request as a default param in a second
parameter list, but this would sludge up the API.
Revert accidental limit removal.
Cleanup.
Merge branch 'topic/task-parsers' of https://github.com/http4s/http4s into topic/task-parsers