[WIP] Upstream AceEditorWidget and library

Authored by Jdforrester-WMF on Nov 10 2016, 7:16 PM.

Description

[WIP] Upstream AceEditorWidget and library

Rather than rely on the environment providing a compatible version.

Change-Id: I4b3b1a41c2444a38cb3705fa4989d4e5e2e74272

Details