Bump version numbers for 1.2.0 release

Reviewed-by: imsnah

NEWS

+Version 1.2.0
+  - Log the ‘xm create’ output to the node daemon log on failure (to
+    help diagnosing the error)
+  - In debug mode, log all external commands output if failed to the
+    logs
+  - Change parsing of lvm commands to ignore stderr
+
 Version 1.2b3
   - Another round of updates to the DRBD 8 code to deal with more
     failures in the replace secondary node operation

configure.ac

 # Configure script for Ganeti
 AC_PREREQ(2.59)
-AC_INIT(ganeti, 1.2b3, ganeti@googlegroups.com)
+AC_INIT(ganeti, 1.2.0, ganeti@googlegroups.com)
 AC_CONFIG_AUX_DIR(autotools)
 AC_CONFIG_SRCDIR(configure)
 AM_INIT_AUTOMAKE([foreign tar-ustar])

doc/install.sgml

@@ -605,8 +605,8 @@ vgextend xenvg /dev/sdd1
       </para>
 
         <screen>
-tar xvzf ganeti-1.2b3.tar.gz
-cd ganeti-1.2b3
+tar xvzf ganeti-1.2.0.tar.gz
+cd ganeti-1.2.0
 ./configure --localstatedir=/var --sysconfdir=/etc
 make
 make install