procenv 0.27 released

Written for procenv by James Hunt on 2013-10-14

* Added IPC options '--shared-memory', '--semaphores' and
  '--message-queues'.
* Added rudimentary "make check" tests.
* Made default text output highly structured.
* Added ability to produce output in XML, JSON and "breadcrumb"
  (including CSV) formats.
* Added ability to specify indent amount, indent character and
  separators (via command-line or environment variable).