Update NEWS file for the 0.1.4 release

NEWS

+Version 0.1.4 (Tue, 16 Jun 2009):
+  - Added CPU count/ratio of virtual-to-physical CPUs to the cluster
+    scoring methods; this means that now the balancer, the iallocator
+    plugin and so on will try to keep the VCPU-to-PCPU ratio equal
+    across the cluster
+  - Fixed some hscan bugs
+  - Fixed the way iallocator reads the total disk size (was broken and
+    it was always falling back to summing the disk sizes)
+  - Internals: fixed most compile-time warnings
+
 Version 0.1.3 (Fri, 05 Jun 2009):
   - Fix a bug in the ReplacePrimary instance moves, affecting most of
     the tools