docs: Add 10.3 sha256 sums, news item and link release notes

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
(cherry picked from commit 18571edea8f444fc6b4ed2b38f945f0ac533f384)

Conflicts:
	docs/index.html
	docs/relnotes.html

docs/index.html

@@ -16,6 +16,17 @@
 
 <h1>News</h1>
 
+<h2>September 19, 2014</h2>
+<p>
+<a href="relnotes/10.3.html">Mesa 10.3</a> is released.  This is a new
+development release.  See the release notes for more information about
+the release.
+</p>
+<p>
+Also, <a href="relnotes/10.2.8.html">Mesa 10.2.8</a> is released.
+This is a bug fix release from the 10.2 branch.
+</p>
+
 <h2>September 6, 2014</h2>
 <p>
 <a href="relnotes/10.2.7.html">Mesa 10.2.7</a> is released.

docs/relnotes.html

@@ -21,6 +21,8 @@ The release notes summarize what's new or changed in each Mesa release.
 </p>
 
 <ul>
+<li><a href="relnotes/10.3.html">10.3 release notes</a>
+<li><a href="relnotes/10.2.8.html">10.2.8 release notes</a>
 <li><a href="relnotes/10.2.7.html">10.2.7 release notes</a>
 <li><a href="relnotes/10.2.6.html">10.2.6 release notes</a>
 <li><a href="relnotes/10.2.5.html">10.2.5 release notes</a>

docs/relnotes/10.3.html

@@ -31,9 +31,11 @@ because compatibility contexts are not supported.
 </p>
 
 
-<h2>MD5 checksums</h2>
+<h2>SHA256 checksums</h2>
 <pre>
-TBD.
+9a1bf52040fc3dda81e83a35f944f1c3f532847dbe9fdf57161265cf71ea1bae  MesaLib-10.3.0.tar.gz
+0283bfe710fa449ed82e465cfa09612a269e19abb7e0382082608062ce7960b5  MesaLib-10.3.0.tar.bz2
+221420763c2c3a244836a736e735612c4a6a0377b4e5223fca1e612f49906789  MesaLib-10.3.0.zip
 </pre>