Fix webm PDF bug

Conflicts:
	builds/4chan-X.user.js
	builds/crx/script.js
implement length 1 queue of videos to be deleted
Release 4chan X v1.5.2.
remove unneeded entry from feature initialization list
Reload captcha if there are posts in the queue.

Conflicts:
	LICENSE
	builds/4chan-X.user.js
	builds/crx/script.js
Handle captcha errors with a new captcha!
css fix

Conflicts:
	builds/4chan-X.user.js
	builds/crx/script.js
remove listeners on contract
better approach to hover css

Conflicts:
	builds/4chan-X.user.js
	builds/crx/script.js
get new hover working in catalog

Conflicts:
	builds/4chan-X.user.js
	builds/crx/script.js
	src/General/UI.coffee
	src/Images/ImageHover.coffee
fix hover/expand so it works when switching between catalog/paged modes

Conflicts:
	builds/4chan-X.user.js
	builds/crx/script.js
fix video controls
work around FF forever-loading bug, other tweaks

Conflicts:
	CHANGELOG.md
	builds/4chan-X.user.js
	builds/crx/script.js
implement duckness's upgrade nag disabling option
Skipping 4chan X v1.6.0.

Conflicts:
	CHANGELOG.md
fix issue tracker link
Release 4chan X v1.7.0.
using el.videoHeight here does help

The whole thing appears to be a hack, though;
we should really be using the image dimensions
from the file info.
turn JSON navigation off by default
fix brainfart