Update OOjs UI to v0.1.0-pre (432a76f7d4)

New changes:
ebfa365 Generate RTL stylesheets with CSSJanus
da83ad2 Set tabindex on button <div> instead of <a>
e2a6bb1 Add tabindex=0 and role=button to tool links
432a76f Run node-svgo to crush all SVGs whilst retaining readibility

Change-Id: Ieb775472b05acf42aada190a49f9f768ddcd5084
Merge "Update OOjs UI to v0.1.0-pre (432a76f7d4)"