Add phantom types to doc

Author: nicolasstucki

docs/_includes/features.html

@@ -73,22 +73,26 @@ <h1 id="so-features">So, features?</h1>
                         <td>In progress</td>
                     </tr>
                     <tr class="odd">
+                        <td>Phantom types</td>
+                        <td>In progress</td>
+                    </tr>
+                    <tr class="even">
                         <td></td>
                         <td></td>
                     </tr>
-                    <tr class="even">
+                    <tr class="odd">
                         <td>Implicit functions</td>
                         <td>Considered</td>
                     </tr>
-                    <tr class="odd">
+                    <tr class="even">
                         <td>Effects</td>
                         <td>Considered</td>
                     </tr>
-                    <tr class="even">
+                    <tr class="odd">
                         <td>Auto-completion in repl</td>
                         <td>Considered</td>
                     </tr>
-                    <tr class="odd">
+                    <tr class="even">
                         <td>Spec Option-less pattern matching</td>
                         <td>Considered</td>
                     </tr>