.webm in file shortening
remove unneeded call
Release 4chan X v1.7.1.
get thread expansion working
Release 4chan X v1.7.2.
Clear event listener
Merge branch 'ccd0' into v3

Conflicts:
	LICENSE
	builds/4chan-X.user.js
	builds/crx.crx
	builds/crx/script.js
	src/General/Build.coffee
	src/Miscellaneous/ExpandThread.coffee