cabal init
Generalize (-/-).
Lenses for Request.
POST queries.
DSLish syntax for defining response format.
Export (-/-) instead of (:/) constructor.
Split method encoding into Jenkins.REST.Method module.
Concurrent queries.
Remove GND.
POST queries can also carry a payload.
Catch HttpException.
Do not follow redirects on POST requests.
Rename Jenk* to Jenkins*
Support API token authentication.

Jenkins uses basic auth password field as API token,
so no additional support is actually needed.

If password field does not contain API token, then Jenkins fallback
to user:password authentication
Add doctests.
Add example.