Jitter: new tag v0.7.308, updated poke submodule reference

[Luca Saiu]

Hello.  I made the tag v0.7.308, with some tentative changes.

Please tell me if something is broken in poke.

Regards,

-- 
Luca Saiu      https://ageinghacker.net
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I support everyone's freedom of mocking any opinion or belief, no
matter how deeply held, with open disrespect and the same unrelented
enthusiasm of a toddler who has just learned the word "poo".

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