Update OOjs UI to v0.1.0-pre (48980881f3)

New changes:
aafebc4 LookupInputWidget: Fix whitespace and documentation
cf89618 Element: Remove unneeded IIFE
4898088 build: Create minified JS and CSS distribution files

Change-Id: Iaea30c2429401be4061f30d98a8edc7cce5567b1
Merge "Update OOjs UI to v0.1.0-pre (48980881f3)"