[PATCH v8 00/11] libxl: New event API

[Ian Jackson <ian.jackson@eu.citrix.com>]

There are a couple of hopefully uncontroversial new patches on the
front of this series:

 01/11 .gitignore/.hgignore: New names for ioemu dirs, seabios
 02/11 xl: fix a couple of memory leaks

The remainder of the series is very similar to previous versions.
 - Changes have been made as discussed on the list, plus:
 - One memory leak (missing GC_FREE) is fixed;
 - I have moved a some of the destruction in xl's domain_create to
   reduce false positives from valgrind;
 - Fixed the ocaml stubs to pass the new ao argument (currently
   these stubs are synchronous, which is not ideal but it's not
   clear what an ocaml caller would want).

 03/11 libxl: New API for providing OS events to libxl
 04/11 ocaml, libxl: support "private" fields
 05/11 libxl: New event generation API
 06/11 libxl: introduce libxl_fd_set_nonblock, rationalise _cloexec
 07/11 libxl: Permit multithreaded event waiting
 08/11 libxl: Asynchronous/long-running operation infrastructure
 09/11 libxl: New convenience macro CONTAINER_OF
 10/11 libxl: Introduce libxl__ev_devstate
 11/11 libxl: Convert to asynchronous: device removal

The series has also been rebased and retested.