[spec/tests] Specification of legacy exceptions + tests (#284)

* [legacy] Create specification doc for legacy exception handling

* [test] Create infra for legacy tests

Author: rossberg

document/Makefile

@@ -1,4 +1,4 @@
-DIRS     = core js-api web-api
+DIRS     = core js-api web-api legacy/exceptions
 FILES    = index.html
 BUILDDIR = _build
 

document/index.html

@@ -49,19 +49,32 @@ <h3>Embedder specifications</h3>
   <ul>
   <li><p><b>JavaScript Embedding</b>: defines JavaScript classes and objects for accessing WebAssembly from within JavaScript, including methods for validation, compilation, instantiation, and classes for representing and manipulating imports and exports as JavaScript objects.</p>
     <ul>
-      <li><a href="js-api/index.html">W3C version</a></li>
+      <li><a href="js-api/">W3C version</a></li>
       <!-- <li><a href="https://github.com/WebAssembly/spec/document/js-api/">Sources</a></li> -->
     </ul>
   </li>
 
   <li><p><b>Web Embedding</b>: defines extensions to the JavaScript API made available specifically in web browsers, in particular, an interface for streaming compilation and instantiation from origin-bound <code>Response</code> types.</p>
     <ul>
-      <li><a href="web-api/index.html">W3C version</a></li>
+      <li><a href="web-api/">W3C version</a></li>
       <!-- <li><a href="https://github.com/WebAssembly/spec/document/web-api/">Sources</a></li> -->
     </ul>
   </li>
   </ul>
 
+<h3>Legacy Extensions</h3>
+
+<p>Define extensions that are deprecated, but may still be in use.</p>
+
+  <ul>
+    <li><p><b>Legacy Exception Handling</b>: defines additional instructions for exception handling that may still be available in some engines and tools, specifically web browsers.</p>
+      <ul>
+        <li><a href="legacy/exceptions/">Browser version</a></li>
+      </ul>
+    </li>
+  </ul>
+
+
 <p>
   Source for these documents is available
   <a href="https://github.com/WebAssembly/spec/">here</a>.

document/legacy/exceptions/.gitignore

@@ -0,0 +1,3 @@
+_build
+_static
+document/*.pyc

document/legacy/exceptions/LICENSE

@@ -0,0 +1,50 @@
+W3C SOFTWARE AND DOCUMENT NOTICE AND LICENSE
+
+This work is being provided by the copyright holders under the following
+license.
+
+
+LICENSE
+
+By obtaining and/or copying this work, you (the licensee) agree that you have
+read, understood, and will comply with the following terms and conditions.
+
+Permission to copy, modify, and distribute this work, with or without
+modification, for any purpose and without fee or royalty is hereby granted,
+provided that you include the following on ALL copies of the work or portions
+thereof, including modifications:
+
+* The full text of this NOTICE in a location viewable to users of the
+  redistributed or derivative work.
+
+* Any pre-existing intellectual property disclaimers, notices, or terms and
+  conditions. If none exist, the W3C Software and Document Short Notice
+  (https://www.w3.org/Consortium/Legal/copyright-software-short-notice) should
+  be included.
+
+* Notice of any changes or modifications, through a copyright statement on the
+  new code or document such as "This software or document includes material
+  copied from or derived from [title and URI of the W3C document]. Copyright © [YEAR] W3C® (MIT, ERCIM, Keio, Beihang)."
+
+
+DISCLAIMERS
+
+THIS WORK IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE NO REPRESENTATIONS
+OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, WARRANTIES OF
+MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE
+SOFTWARE OR DOCUMENT WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS,
+TRADEMARKS OR OTHER RIGHTS.
+
+COPYRIGHT HOLDERS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF ANY USE OF THE SOFTWARE OR DOCUMENT.
+
+The name and trademarks of copyright holders may NOT be used in advertising or
+publicity pertaining to the work without specific, written prior permission.
+Title to copyright in this work will at all times remain with copyright
+holders.
+
+
+NOTES
+
+This version:
+http://www.w3.org/Consortium/Legal/2015/copyright-software-and-document