update to cohttp 0.12.0 API (untested)
Read response chunks in a loop, until the Final_chunk or Done

This still needs a resolution to [mirage/ocaml-cohttp#191]

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Update to new Cohttp API

This is the API in [mirage/ocaml-cohttp#196]

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Add opam file

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
oasis: add version constraint on cohttp

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Regenerate OASIS

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #20 from djs55/cohttp-0.12.0-api-almost

Update to prototype Cohttp 0.12.0 API