Please read, unless you don't handle updates in any way.
A silly "bug" which hadn't been spotted has now been fixed. Now you can invoke other requests from within your update callbacks. However this is not advised. You should post these updates to some other thread, and let that thread do the job instead. Invoking a request from within a callback will mean that, while this request is being invoked, no other things will be read.
Internally, the generated code now resides under a lot less files, simply for the sake of avoiding so many unnecessary files. The generated code is not meant to be read by anyone, simply to do its job.
Unused attributes have been removed from the TLObject class too, and .sign_up() returns the user that just logged in in a similar way to .sign_in() now.