Various "just before release" updates and housekeeping

Various "just before release" updates and housekeeping

	* INSTALL: A few minor updates such as typos, URL updates etc.

	* PROBLEMS: Fix a couple of typos.

	* README: Update list of subdirectories.

	* autogen.sh (EXPECTED_TREE_VERSION): Bump.

	* autogen.sh (sxemacs_codename): "Goggomobil"

	* info/sppm.texi: Update "versioning" macros.

	* info/sxemacs/sxemacs.texi (Top): Update version.

	* lisp/startup.el (splash-frame-body): Update my copyright.

	* etc/NEWS: Add this version's release notes.

	* info/sppm.texi (Making Releases): Describe how to generate the
	"Developer Stats" section.

	* info/sppm.texi (Making Releases): Use git to create diff from
	previous versions.

Signed-off-by: Steve Youngs <steve@sxemacs.org>