Roadmap: slide the milestones for 0.5 and 0.6 to realistic dates

This is just a quick update before revamping the roadmap for 2017

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diff --git a/site/roadmap.md b/site/roadmap.md
index 716959d..4057260 100644
--- a/site/roadmap.md
+++ b/site/roadmap.md
@@ -126,7 +126,7 @@
     </tr>
     <tr>
       <td rowspan="4"><b>0.5</b></td>
-      <td rowspan="4"><b>2016&#8209;11</b></td>
+      <td rowspan="4"><b>2017&#8209;01</b></td>
       <td>P0. Support for testing Android apps</td>
     </tr>
     <tr><td>P0. Bazel supports building Java, C++ and Python on Windows</td></tr>
@@ -134,7 +134,7 @@
     <tr><td>P2. Support for Swift language</td></tr>
     <tr>
       <td rowspan="2"><b>0.6</b></td>
-      <td rowspan="2"><b>2017 Q1</b></td>
+      <td rowspan="2"><b>2017&#8209;03 </b></td>
       <td>P0. Searchable "hub" of Skylark rules</td>
     </tr>
     <tr><td>P2. Reference ("pull") remote docker images as an input to the build process</td></tr>