[cxx_status] Mark coroutine TS support as clang 5.0 and change class from svn to full for P0096R4

[GorNishanov]

Summary

Shall we?

[rsmith]

Part of this change (marking the coroutines TS as "Clang 5") is already done, and we will change all the class="svn" entries on this page to class="full" when Clang 5 releases (we keep them in the yellow "SVN" color until they're in a released version of Clang).

Changing the paper number from N4663 to N4680 seems fine to me, though :)

www/cxx_status.html

<tr>
       </td>
     </tr>
     <tr>
       <td class="full" align="center">
         Clang 4 (<a href="http://wg21.link/p0096r3">P0096R3</a>)</a>
       </td>
     </tr>
     <tr>
-      <td class="svn" align="center">
+      <td class="full" align="center">
         Clang 5 (<a href="http://wg21.link/p0096r4">P0096R4</a>)</a>
       </td>
     </tr>
     <!-- FIXME: Implement latest recommendations.
     <tr>
       <td class="svn" align="center">
         SVN (<a href="http://wg21.link/p0096r3">P0096R3</a>)</a>
       </td>
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     <tr>
       <td>[TS] Concepts</td>
       <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0121r0.pdf">P0121R0</a></td>
       <td></td>
       <td class="none" align="center">WIP</td>
     </tr>
     <tr>
       <td>[DRAFT TS] Coroutines</td>
-      <td><a href="https://isocpp.org/files/papers/N4663.pdf">N4663</a></td>
+      <td><a href="http://open-std.org/jtc1/sc22/wg21/docs/papers/2017/n4680.pdf">N4680</a></td>
       <td><tt>-fcoroutines-ts<br>-stdlib=libc++</tt></td>
-      <td class="svn" align="center">SVN</td>
+      <td class="full" align="center">Clang 5 (<a href="http://open-std.org/jtc1/sc22/wg21/docs/papers/2017/n4680.pdf">N4680</a>)</td>
     </tr>
     <tr>
       <td>[TS] Library Fundamentals, Version 1 (invocation type traits)</td>
       <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4480.html">N4480</a></td>
       <td>N/A</td>
       <td class="none" align="center">No</td>
     </tr>
     <tr>