Update docs for check utility changes and for 1.3 release. Bump versions

for release of 1.3. Update copyrights that I forgot on the previous
commits.

include/boost/predef/platform/mingw.h

@@ -1,5 +1,5 @@
 /*
-Copyright Rene Rivera 2008-2013
+Copyright Rene Rivera 2008-2015
 Distributed under the Boost Software License, Version 1.0.
 (See accompanying file LICENSE_1_0.txt or copy at
 http://www.boost.org/LICENSE_1_0.txt)

include/boost/predef/platform/windows_desktop.h

@@ -1,5 +1,6 @@
 /*
 Copyright (c) Microsoft Corporation 2014
+Copyright Rene Rivera 2015
 Distributed under the Boost Software License, Version 1.0.
 (See accompanying file LICENSE_1_0.txt or copy at
 http://www.boost.org/LICENSE_1_0.txt)

include/boost/predef/platform/windows_phone.h

@@ -1,5 +1,6 @@
 /*
 Copyright (c) Microsoft Corporation 2014
+Copyright Rene Rivera 2015
 Distributed under the Boost Software License, Version 1.0.
 (See accompanying file LICENSE_1_0.txt or copy at
 http://www.boost.org/LICENSE_1_0.txt)

include/boost/predef/platform/windows_runtime.h

@@ -1,5 +1,6 @@
 /*
 Copyright (c) Microsoft Corporation 2014
+Copyright Rene Rivera 2015
 Distributed under the Boost Software License, Version 1.0.
 (See accompanying file LICENSE_1_0.txt or copy at
 http://www.boost.org/LICENSE_1_0.txt)

include/boost/predef/platform/windows_store.h

@@ -1,5 +1,6 @@
 /*
 Copyright (c) Microsoft Corporation 2014
+Copyright Rene Rivera 2015
 Distributed under the Boost Software License, Version 1.0.
 (See accompanying file LICENSE_1_0.txt or copy at
 http://www.boost.org/LICENSE_1_0.txt)