updating changelog, listing important changes since 0.54

changelog.html

@@ -1,6 +1,12 @@
 <span>TBD - 0.55</span>
 <p>
-    - <br />
+    - Minimum required chrome release set to 38+<br />
+    - Setup tab performance improvements, faster 3D model<br />
+    - Strongly improved amount of data stored in backups<br />
+    - Improved flash on connect in firmware flasher<br />
+    - Bugfix for corrupted minimum window size on Windows 7<br />
+    - Bugfix for incorrect date &amp; time in firmware flasher<br />
+    - Bugfix for port handler firing before port being initialized<br />
 </p>
 <span>10.06.2014 - 0.54</span>
 <p>