Update VE core submodule to master (0dd43dc)

New changes:
93e42f0 Fix documentation
b4574e4 MobileContext fixes
312cf30 Switch mobile demo from deprecated Minerva to MediaWiki
8656c51 Localisation updates from https://translatewiki.net.
3c51598 Stage slugs
ed9a456 Get rid of trigger-happy slugChange event
1074bab Replace pawns with unicorns for pre-annotations
de5cb90 Make slug animations work again
54c711d Localisation updates from https://translatewiki.net.
c05bf65 build: Update karma and switch from PhantomJS to Chrome
d172dcc Update OOjs UI to v0.1.0-pre (837b2f733e)
d8bffa0 Fix icon opacity
22a25bc Localisation updates from https://translatewiki.net.

Local changes:
* Disable most IME tests in VE-MW because they fail

Change-Id: I475a83eac76d9c20b206113bbd0e2a4c352fdb66