[ClusterLabs Developers] Pacemaker pull request policy for 2.0.5

[Christopher Lumens]

Hi all,

Now that we've started the 2.0.5 release cycle, our usual change in
pull request policy applies:

Pull requests with new features should continue to be submitted against
the master branch. Pull requests with only bug fixes should be
submitted against the 2.0 branch if they are intended for the 2.0.5
release.

- Chris Lumens