alfred.py: use gzip (requires alfred-json v0.2)

(cherry picked from commit 263dd4ceff65c40d90b7f40937986bf3612d8f45)
Signed-off-by: Alexander Dahl <alex@netz39.de>
Merge pull request #1 from LeSpocky/master

alfred.py: use gzip (requires alfred-json v0.2)