Now RPC results can be received from the updates thread, as long
as they are errors. This, however, should not happen!
A recursive lock is now used (and released on every method, rather
than only on the `.receive()` one)
The .empty() function returns an "empty" instance of the object
(attributes set to None). This is used rather than using reflection.
The msgs_ack handling broke stuff (InvokeWithLayer when there were
updates), so this is now handled; yet there may be a better fix
The module is now ready to be installed via pip
README.md has been updated to reflect these changes
Minor changes to the interactive client example
Versioning is now done by editting TelegramClient's
__version__, rather than looking for the string
