[ANN] posix_mq 0.6.0 - Rubinius support

POSIX message queues allow local processes to exchange data in the form
of messages. This API is distinct from that provided by System V
message queues, but provides similar functionality.

* http://bogomips.org/ruby_posix_mq/
* ruby.posix.mq@librelist.com
* git://git.bogomips.org/ruby_posix_mq.git

Changes:

This supports Rubinius 1.2 as well as Ruby 1.9. Ruby 1.8 works except
it will block the entire interpreter for blocking operations. Spurious
errors during GC for POSIX_MQ#to_io users are now avoided.

ยทยทยท

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Eric Wong