Update README.md

[gras64]

add link and description to my corpus file generator

[forslund]

Hi thanks for this, and sorry for the late response. The corpus generator looks quite useful. Could you change the wording slightly to

"To automatically create a corpus file in your language, ..."

[krisgesling]

Hey Andreas, just saw this old PR and thought I'd send a nudge.

Looks like a useful tool to add to the README if we can tweak the language a tiny bit.

Edit: Oh also the Translate platform is based on "Pootle" :)