missing error msg (publier)

Signed-off-by: JB Touchard <jbt@txtnet.com>
Pure mustache impl wip
Fix Pure mustache impl
Add check if performance mustache is ok
bug with disciplines

Signed-off-by: JB Touchard <jbt@txtnet.com>
Merge branch 'master' of https://github.com/Education-Numerique/authoring.js

Conflicts:
	src/app/common/helpers/redactorPlugins.js
Merge branch 'master' into perf-if-mustache
Merge pull request #213 from mbreton/perf-if-mustache

Perf if mustache