tweaked readme
tweaked readme

Change-Id: Ic98842d6a65d36adf31aae469c82e3c5c997abd6
Signed-off-by: Mateusz Bysiek <77666125932addc6fc525b281b518fd8fd2203d8@mbdev.pl>

mbdevpl/typed-astunparse,mbdevpl/typed-astunparse