1.34 Release
From this release, release notes move to a documentation website
generated by sphinx, into which more content about fedpkg could be put
in the future.
Change logs are moved from CHANGELOG.rst to separate release notes, each
of them is a standalone web page in the site.
Command request-repo help text is updated as well.
Signed-off-by: Chenxiong Qi <cqi@redhat.com>