added browserify test

.gitignore

@@ -0,0 +1,4 @@
+node_modules
+browserify-test/compiled.js
+browserify-test/script.js
+browserify-test/script.map

browserify-test/build.sh

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+#!/bin/sh
+
+coffee --map --compile script.coffee
+browserify --debug script.js > compiled.js

browserify-test/index.html

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+<p>
+Make sure to run build.sh.
+This test should say either "Test failed" or "Test passed":
+</p>
+<script src="compiled.js"></script>

browserify-test/script.coffee

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+(require '../source-map-support').install()
+
+foo = -> throw new Error 'foo'
+
+try
+  foo()
+catch e
+  if /\bscript\.coffee\b/.test e.stack
+    document.write 'Test passed'
+  else
+    document.write 'Test failed'
+    console.log e.stack