docs: fix links to point to freedesktop.org

kmscon is now hosted on freedesktop.org. Please don't use the github
links, anymore. I will push to github for some more weeks, but I recommend
to everyone to use my freedesktop.org repository as primary upstream link.

There were many reasons why github.com wasn't sufficient, anymore. But the
main reason is that they no longer provide upload space for release
tarballs. Hence, lets ditch github and move to freedesktop.org which
kindly provides everything we need plus a really nice mailing-list.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>

README

@@ -4,6 +4,9 @@ Kmscon is a simple terminal emulator based on linux kernel mode setting (KMS).
 It is an attempt to replace the in-kernel VT implementation with a userspace
 console. See kmscon(1) man-page for usage information.
 
+Website:
+  http://www.freedesktop.org/wiki/Software/kmscon
+
 == Requirements ==
 
   Kmscon requires the following software:
@@ -30,6 +33,11 @@ console. See kmscon(1) man-page for usage information.
     For multi-seat support you need the following packages:
       - systemd: Actually only the systemd-logind daemon and library is required.
 
+== Download ==
+
+Released tarballs can be found at:
+  http://people.freedesktop.org/~dvdhrm/kmscon/releases
+
 == Install ==
 
   To compile the kmscon binary, run the standard autotools commands:
@@ -109,10 +117,10 @@ console. See kmscon(1) man-page for usage information.
 
 == FAQ ==
 
-  Please see http://github.com/dvdhrm/kmscon/wiki
+  Please see: http://www.freedesktop.org/wiki/Software/kmscon
 
 == Contact ==
 
   This software is maintained by:
-    David Herrmann <dh.herrmann@googlemail.com>
+    David Herrmann <dh.herrmann@gmail.com>
   If you have any questions, do not hesitate to contact one of the maintainers.

configure.ac

@@ -5,8 +5,11 @@
 
 AC_PREREQ(2.68)
 
-AC_INIT([kmscon], [7])
-AC_SUBST(PACKAGE_URL, [https://github.com/dvdhrm/kmscon])
+AC_INIT([kmscon],
+        [7],
+        [http://bugs.freedesktop.org/enter_bug.cgi?product=kmscon],
+        [kmscon],
+        [http://www.freedesktop.org/wiki/Software/kmscon])
 AC_CONFIG_SRCDIR([src/kmscon_main.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])