Update NEWS file and release Ganeti 2.0.5

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

NEWS

+Version 2.0.5
+  - Fix security issue due to missing validation of iallocator names;
+    this allows local and remote execution of arbitrary executables
+  - Fix failure of gnt-node list during instance removal
+  - Ship the RAPI documentation in the archive
+
 Version 2.0.4
   - Fixed many wrong messages
   - Fixed a few bugs related to the locking library

configure.ac

 # Configure script for Ganeti
 m4_define([gnt_version_major], [2])
 m4_define([gnt_version_minor], [0])
-m4_define([gnt_version_revision], [4])
+m4_define([gnt_version_revision], [5])
 m4_define([gnt_version_suffix], [])
 m4_define([gnt_version_full],
           m4_format([%d.%d.%d%s],