1.5.0-alpha1 tarballs up for testing/signing

Subversion 1.5.0-alpha1 is up for testing and signing. The magic
revision is r29540.

http://orac.ece.utexas.edu/pub/svn/1.5.0-alpha1/

As usual, signatures from full committers back to me, and enthusiastic
tester feedback is welcome. Because this is an alpha, we are relaxing
the signature requirement, and will only require 2 signatures on each
platform before release. At this point, though, this alpha is not yet
blessed for wide release, so please don't make it available to people
not interested in test-driving the new release.

Also, distro package maintainers, please to NOT include any pre-release
builds, even blessed, into operating system distros. The reasons for not
doing so were very eloquently outlined by Karl in a mail, which is
summarized at the above address.

The quick version is: we don't guarantee compatibility between the
pre-releases and the final release, so if people install the alpha, all
their repositories and working copies might break unrepairably when they
upgrade to 1.4.0 proper. We don't want that kind of bad publicity,
and neither do you.

-Hyrum (who is, coincidentally, sitting right next to an Alpha as he
writes this)