Add ability to set authenticated true or false in mock endpoint.
Defaults to true. Fixes copyright symbol.
Wiki urls can have an authenticated and unauthenticated version;
modifying urls, tests and service to account for this. URLBuilder
updated to check for authentication.
Update wiki export to export images an get all wiki pages.
Code review changes
Merge pull request #1557 from fmoloney/alphaexportwiki

Alphaexportwiki