Add ocp-indent to INSTALL list
Cohttp_async now makes the HTTP body type abstract.

Convert code to `Pipe.to_list (Cohttp_async.Body.to_pipe body)`
to obtain the list of strings now.  Note that this can be optimized
to `Cohttp_async.Body.to_string` to remove the subsequent string
concatenation, but I chose to minimise code churn for now.
Core_bench no longer has a `name` parameter
Ctypes has a slightly different interface to handle errno checking
Merge pull request #15 from avsm/errata-1

Errata 1 for latest Core/Async