Add dependencies for ZeroPortal and ZeroBanner

This adds parserfunctions, scribunto, and graph. It also
adds raw HTML support plus mocks local wikis to support
language-aware redirects and the like.

Change-Id: I6e5e9f4cddf0742f2dfad6e48cda6c0813ac59aa
Merge "Add dependencies for ZeroPortal and ZeroBanner"