Fix plugin CSS files on Windows
Merge pull request #802 from tedr56/master

Fr translation Updates
Add Simplized Chinese.

Just modified the .json in language folder and some .tpl in the
templates folder(except the admin folder). Noted there are a lot of
front-end related code in the .js files, I’ll move on to them.
upped minver of vanilla to 0.0.13 - please update
deleted BS css files from core - please update vanilla
closes #796
Merge branch 'master' of https://github.com/designcreateplay/NodeBB
upped minver of cerulean to 0.0.12 - please upgrade
closes #799
Merge branch 'master' of https://github.com/designcreateplay/NodeBB
fixed dependency check for cerulean
removed deprecated cssSrc, replaced with optional bootswatchCSS
grouped post buttons in dropdowns
Merge branch 'master' of https://github.com/designcreateplay/NodeBB
closes #806
closes #798
fixed crash if empty topic was loaded without ajaxify
added check for undefined, null empty string
title is no longer centered in composer
closes #809