Temporarily disable the filewatcher functionality

It's currently broken, awaiting a fix from @natecain
Add a wiki.makeWidget() method

Encapsulates some logic that has been duplicated elsewhere.
Use the new wiki.makeWidget() method where we can
Update fakedom to no longer add a newline after opening tags

The newline was being rendered within `<code>` elements.
Docs clarification
Fix filesystem adaptor to use new widget mechanism
Docs updates