Refactor events API, subscription methods and error handling

CHANGELOG.md

@@ -1,3 +1,28 @@
+1.3.0
+=====
+
+**Client API completely refactored in this release**. You can still use previous versions
+to communicate with Centrifugo server from browser environment but new implementation much
+more comfortable to use in our opinion and will be supported in future releases so consider
+upgrading!
+
+Highlights of this release:
+
+* automatic resubscribe, no need to subscribe manually in `connect` event handler
+* more opaque error handling
+* drop support for SockJS < 1.0.0 (but if you still use SockJS 0.3.4 then feel free to open
+    issue and we will return its support to client)
+
+Please, read [new documentation](https://fzambia.gitbooks.io/centrifugal/content/clients/javascript.html)
+for Javascript browser client.
+
+Also, DOM plugin was removed from repository as new client API design solves most of problems
+that DOM plugin existed for - i.e. abstracting subscribe on many channels and automatically
+resubscribe on them. With new client you can have one global connection to Centrifugo and
+subscribe on channels at any moment from any part of your javascript code.
+
+If you are searching for old API docs (`centrifuge-js` <= 1.2.0) - [you can find it here](https://github.com/centrifugal/documentation/tree/c69ca51f21c028a6b9bd582afdbf0a5c13331957/client)
+
 1.2.0
 =====