Update VE core submodule to master (000935e)

New changes:
5321ee2 Work around IE DOMParser bug in ve.createDocumentFromHtml
3d6f0e2 Use subtle border styling for unstyled tables
b1baa3d Localisation updates from https://translatewiki.net.

Change-Id: Ic962fbc1dcbca1a83b4c16756278981c45c5e865