Version bump and changelog update

Author: Kevin Paulisse

.version

@@ -1 +1 @@
-0.5.4
+0.5.5

doc/CHANGELOG.md

@@ -8,6 +8,15 @@
 </tr>
 </thead><tbody>
 <tr valign=top>
+<td>0.5.5</td>
+<td>2016-11-16</td>
+<td>
+<ul>
+<li><a href="https://github.com/github/octocatalog-diff/pull/20">https://github.com/github/octocatalog-diff/pull/20</a>: Use modulepath from environment.conf to inform lookup directories for <code>--compare-file-text</code> feature</li>
+</ul>
+</td>
+</tr>
+<tr valign=top>
 <td>0.5.4</td>
 <td>2016-11-07</td>
 <td>