French translation
Fixes #1481

Clear out pending errors on player disposal.
Source selection errors are dispatched asynchronously so that there is an opportunity to override the error message. If the player is disposed during that period, the error timeout wasn't being cleared properly. Fix for #1480.

Fix whitespace
When defining variables inline with declarations, stick to one variable per line.
Make sure the error property is set before proxying through the tech.
Some error events don't cause the error property on the video element to be set. In that case, handle the event like any other. Fixes #1465.
Added line to the changelog for #1482
Move language methods into externs
Trying to create a player-like subclass of component requires overriding languages() but that method was being minified. Add it to externs so that it can be overridden after minification. Fixes #1420.
Added a line to the changelog for #1483
updated styles for error messages and made poster absolutely positioned by default
Added a line to the changelog for #1487
Added back missing deprecated fullscreen functions, and fixed a warning from using a deprecated method internally.

fixes #1451
Merge commit 'a582c833e34c227ff29b707bad9cd4857f32c877' of github.com:MrVaykadji/video.js into french
Added a line to the changelog for #1467
Merge branch 'hotfix/fullscreen-deprecations' into stable
Added a line to the changelog for #1488
Release 4.8.1
Merge branch 'stable'

Conflicts:
	dist/video-js/video-js.css
	dist/video-js/video-js.less
	dist/video-js/video-js.min.css
	dist/video-js/video.dev.js
	dist/video-js/video.js