Remove weird rule.
Progressive optimized jpegs.

assets/img/jump-off-a-cliff.jpg (29kb) -> (28kb)
assets/img/jump-off-a-cliff-sharecon.jpg (27kb) -> (26kb)
assets/img/matriarchy.jpg (43kb) -> (39kb)
assets/img/matriarchy-sharecon.jpg (48kb) -> (44kb)
assets/img/parliament.jpg (129kb) -> (124kb)
assets/img/parliament-sharecon.jpg (118kb) -> (114kb)
assets/img/shanty-town.jpg (120kb) -> (95kb)
assets/img/shanty-town-sharecon.jpg (120kb) -> (95kb)
assets/img/singularity.jpg (143kb) -> (99kb)
assets/img/steve-jobs.jpg (89kb) -> (86kb)
assets/img/steve-jobs-sharecon.jpg (50kb) -> (48kb)
assets/img/unterlumpenproletariat.jpg (94kb) -> (92kb)
assets/img/unterlumpenproletariat-sharecon.jpg (23kb) -> (22kb)
assets/img/wedes.jpg (86kb) -> (84kb)
assets/img/welfare-cliff.jpg (376kb) -> (361kb)