Fixes GH-43.

PROBLEM SOLVED.
Fixed YotsubaJSON parsing errors. Enabled wget retry on 503 status code. Touch existing full media Last Modified Date.
Selectively applying oohnoitz fixes.

Deadlink fix, capcode fix.
New spoiler HTML tag 

Bumping versions of dependencies.

So bleeding edge I just cut myself.
merged master, fixed regex, added YotsubaMixed