Update changelog.md

Author: misaochan

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Wikimedia Commons for Android
 
+## v2.6.4 beta
+- Excluded httpclient and commons-logging to fix release build errors
+- Fixed crashes caused by Fresco and Dagger
+
+## v2.6.3 beta
+- Same as 2.6.2 except with localizations added for Google Code-In 
+
+## v2.6.2 beta
+- Reverted temporarily to last stable version while working on crash fix
+
+## v2.6.1 beta
+- Failed attempt to fix crashes in release build with the previous beta release
+
 ## v2.6.0 beta
 - Multiple bugfixes for location updates and list/map loading in Nearby
 - Multiple fixes for various crashes and memory leaks