Emacs 24.3 development moved to emacs-24 branch

[Chong Yidong]

I have now pushed the contents of the trunk onto the emacs-24 branch.
Please use this branch now for all your Emacs 24.3 work.  The commit
policy for the emacs-24 branch will be "bug fixes for regressions
against Emacs 23 only", plus regressions against previous Emacs 24
releases and documentation fixes.  If you want an exception to the
commit policy, discuss it on emacs-devel.

The trunk has been bumped to version 24.3.50, and is now open for
non-bugfix changes.  However, kindly hold off on any changes which might
cause difficulty when merging bugfixes from the emacs-24 branch into the
trunk, for the moment.

The previous contents of the emacs-24 branch are tagged as
`emacs-24.3-base', in the unlikely event that we will need it.