Update changelog ahead of 2.0.6 release

CHANGELOG.txt

@@ -1,6 +1,20 @@
 CKAN CHANGELOG
 ++++++++++++++
 
+v2.0.6 2015-03-04
+=================
+
+Bug fixes:
+ * Only link to http, https and ftp resource urls (#2085)
+ * Avoid private and deleted datasets on stats plugin (#1936)
+ * Fix tags count and group links in stats extension (#1649)
+ * Make resource_create auth work against package_update (#2037)
+ * Fix datastore docs link (#2044)
+ * Fix resource extras getting lost on resource update (#2158)
+ * Clean up field names before rendering the Recline table (#2319)
+ * Don't "normalize" resource URL in recline view (#2324)
+ * Don't assume resource format is there on text preview (#2320)
+
 v2.0.5 2014-10-15
 =================