Update CHANGES.rst and newest version number

CHANGES.rst

 Changelog
 =========
 
-0.5.3 (Unreleased)
+0.6.0 (Unreleased)
 ------------------
 
+- #39 Documentation for minifying JS is wrong. [jcbrand]
+- #41 prebind and show_controlbox_by_default true fails. [jcbrand]
+- With prebinding, attaching to the connection now happens inside Converse and
+  not as a separate step after initialization. [jcbrand]
 - Register presence and message handlers before fetching the roster. Otherwise
   some presence notifications might be missed. [jcbrand]
 - Add a debug option (logs to the browser console). [jcbrand]
+- Use font icons from http://icomoon.io [jcbrand]
+- Added a static mockup to aid CSS/design process. [jcbrand]
 
 0.5.2 (2013-08-05)
 ------------------

bower.json

 {
   "name": "converse",
-  "version": "0.5.2",
+  "version": "0.6.0",
   "devDependencies": {
     "jasmine": "https://github.com/jcbrand/jasmine.git#1_3_x"
   },

docs/source/conf.py

@@ -48,9 +48,9 @@ copyright = u'2013, JC Brand'
 # built documents.
 #
 # The short X.Y version.
-version = '0.5.3'
+version = '0.6.0'
 # The full version, including alpha/beta/rc tags.
-release = '0.5.3'
+release = '0.6.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.