xapp_xinit: revert removal

Even though xinit isn't included in the X11R7.7 release it is very
useful for debugging and quick tests.
Reinstante it without xdm requiring it though.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
news.html: add 2013.05-rc1 annoucement link

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
CHANGES: update with recent changes

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Update for 2013.05-rc2

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Merge remote-tracking branch 'upstream/master'