Typings/2018 09 22

[AndyyTaylor]

Hey mate,

First time writing Python typings so lemme know if I stuffed anything :)

I can't find any errors, the only thing I couldn't properly check are return types since PyCharm doesn't wanna resolve them :(

[daboross]

Thanks for doing this! If we just re-add Uint8Array to the __all__ in transcrypt.py and add it to the __all__ in __init__.py this should be good.

[AndyyTaylor]

Added Uint8Array to all and init :)

[daboross]

Looks good :)

Thanks for doing this!