Addressing some common issues with search on the webapp:

• MoEML did not have the search results highlighting constraint that limits hits within a document to ten, which I'd already implemented for Mariage and Scancan. That's now done.
• It was possible to get eXist error pages if you crafted an ill-formed search. I'm now trapping that with a try-catch and just returning zero hits (all projects).
• Wildcard searching with leading wildcards is now implemented.
• Search tips page has been rewritten for MoEML.