bump version to v1.2.3 and update readme (EasyTier#280)

bump version to v1.2.2

add chinese help message

bump version to v1.2.0

fix udp proxy not work when being exit node (EasyTier#133)

update readme (EasyTier#65)

add picture of gui

Readme (EasyTier#40)

* update readme, add chinese readme version