Update RELEASE_NOTES for recent updates

RELEASE_NOTES

 RELEASE NOTES FOR SLURM VERSION 2.2
-05 January 2010 (through SLURM 2.1.0)
+05 February 2010 (through SLURM 2.2.0-pre1+)
 
 
 IMPORTANT NOTE:
-SLURM state files in version 2.2 are different from those of version 2.1.
-After installing SLURM version 2.2, plan to restart without preserving
-jobs or other state information. While SLURM version 2.1 is still running,
-cancel all pending and running jobs (e.g.
-"scancel --state=pending; scancel --state=running"). Then stop and restart
-daemons with the "-c" option or use "/etc/init.d/slurm startclean".
-
 If using the slurmdbd (SLURM DataBase Daemon) you must update this first.
 The 2.2 slurmdbd will work with SLURM daemons at version 1.3.0 and above.
 You will not need to update all clusters at the same time, but it is very
@@ -18,12 +11,12 @@ any other clusters making use of it.  No real harm will come from updating
 your systems before the slurmdbd, but they will not talk to each other
 until you do.
 
-There are substantial changes in the slurm.conf configuration file. It
-is recommended that you rebuild your configuration file using the tool
-doc/html/configurator.html that comes with the distribution.
+SLURM can be upgraded from version 2.1 to version 2.2 without loss of jobs or
+other state. 
 
 
 HIGHLIGHTS
+==========
 * Slurmctld restart/reconfiguration operations have been altered. 
   NOTE: There will be no change in behavior unless partition configuration 
   or node Features/Weight are altered using the scontrol command to differ 
@@ -47,15 +40,31 @@ HIGHLIGHTS
   was formerly always recreated from slurm.conf. 
 
 CONFIGURATION FILE CHANGES (see "man slurm.conf" for details)
+=============================================================
 * Added VSizeFactor to enforce virtual memory limits for jobs and job steps as
   a percentage of their real memory allocation.
 
 COMMAND CHANGES (see man pages for details)
-
+===========================================
+* sinfo -R now has the user and timestamp in separate fields from the reason.
 
 BLUEGENE SPECIFIC CHANGES
+=========================
+
+OTHER CHANGES
+=============
+* Much functionality has been added to account_storage/pgsql.  The plugin
+   is still in a very beta state.
+
+* SLURM's PMI library (for MPICH2) has been modified to properly execute an 
+  executable program stand-alone (single MPI task launched without srun).
+
+* Added support for spank_get_item() to get S_STEP_ALLOC_CORES and 
+  S_STEP_ALLOC_MEM. Support will remain for S_JOB_ALLOC_CORES and 
+  S_JOB_ALLOC_MEM. 
 
 API CHANGES
+===========
 * Changed members of the following structs:
 job_info_t
 	num_procs -> num_cpus
@@ -85,6 +94,3 @@ update_node_msg_t
 * Added the following API's
 
 * Changed the following API's
-
-
-OTHER CHANGES