Merge pull request #442 from cockroachdb/bash-requirement

add bash as install requirement

install-cockroachdb.md

@@ -174,7 +174,10 @@ $(document).ready(function(){
         <p>A <a href="http://golang.org/doc/code.html">Go environment</a> with a 64-bit version of Go 1.6.2. You can download the <a href="https://golang.org/dl/">Go binary</a> directly from the official site. Be sure to set the <code class="highlighter-rouge">$GOPATH</code> and <code class="highlighter-rouge">$PATH</code> environment variables as described <a href="https://golang.org/doc/code.html#GOPATH">here</a>.</p>
       </li>
       <li>
-        <p>Git 1.8+.</p>
+        <p>Git 1.8+</p>
+      </li>
+      <li>
+        <p><a href="https://www.gnu.org/software/bash/">Bash</a></p>
       </li>
     </ul>
     <p>Note that at least 2GB of RAM is required to build from source. If you plan to run our test suite as well, you'll need closer to 4GB of RAM.</p>
@@ -318,7 +321,10 @@ $(document).ready(function(){
         <p>A <a href="http://golang.org/doc/code.html">Go environment</a> with a 64-bit version of Go 1.6.2. You can download the <a href="https://golang.org/dl/">Go binary</a> directly from the official site. Be sure to set the <code class="highlighter-rouge">$GOPATH</code> and <code class="highlighter-rouge">$PATH</code> environment variables as described <a href="https://golang.org/doc/code.html#GOPATH">here</a>.</p>
       </li>
       <li>
-        <p>Git 1.8+.</p>
+        <p>Git 1.8+</p>
+      </li>
+      <li>
+        <p><a href="https://www.gnu.org/software/bash/">Bash</a></p>
       </li>
     </ul>
     <p>Note that at least 2GB of RAM is required to build from source. If you plan to run our test suite as well, you'll need closer to 4GB of RAM.</p>