Bump version to 1.6.0.

Author: divVerent

configure.ac

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-define([thisversion],[1.5.1])
-define([nextversion],[1.5.1])
+define([thisversion],[1.6.0])
+define([nextversion],[1.6.0])
 AC_INIT([xsecurelock],thisversion,[rpolzer@google.com])
 AM_INIT_AUTOMAKE([-Wall subdir-objects foreign])
 AC_PROG_CC