0.28 release update - beta 2 is available

Hi, everyone. Instead of an RC, I've produced another beta for 0.28. The
C++ test failures I mentioned in my last update are still present, and
there's a Java build addition set to land before the first RC.

https://dist.apache.org/repos/dist/dev/qpid/0.28-beta2/
http://people.apache.org/~jross/maven-0.28-beta2/
http://people.apache.org/~jross/qpid-0.28-beta2-testing.txt

Beta 2 is from revision 1586009 of the release branch. These are the
changes since beta 1:

https://paste.apache.org/fn2n

I've adjusted the dates on the release page. RC1 is set for the middle of
next week.

Thanks!
Justin

0.28 release page:
https://cwiki.apache.org/confluence/display/qpid/0.28+Release