Updated 5.1 Changelog

Doc/changelog.docu

@@ -29,9 +29,21 @@
 
 <tr valign=top><td><b>5.1</b> (?/?/?)</td><td>
 
+<b>Core</b>
+<ul>
+<li>Added clean_keep_reservation() (remove all elements from the mesh but keeps the properties. In contrast to clean() the memory used for the elements will remain allocated</li>
+</ul>
+
 <b>General</b>
 <ul>
 <li>Fixed bug preventing from building with 2 dimensional vectors (e.g. vec2i) </li>
+<li>Heap: Minor cleanup (some consts)</li>
+</ul>
+
+
+<b>VectorT</b>
+<ul>
+<li>take VectorT argument by reference for non-member vector scalar multiplication</li>
 </ul>
 
 <b>Unittests</b>
@@ -40,6 +52,12 @@
 <li>Added tests for vec2x construction</li>
 </ul>
 
+<b>Build System</b>
+<ul>
+<li>Fixed missing debug dll for autobuilders</li>
+</ul>
+
+
 </tr>