Add: ghostInfoLoad

Add function to retrieve information from XML files that have the suffix
info (e.g. planetinfo.xml).  Info is used for the elaboration of certain
kinds of data: e.g. planetinfo describes elements about the planet (like
what a barren planet is like).

Also fully fixed bug in search where blackholes throw an exception and
stop the search from continuing.
change: description

Descriptions now appear in a new tab rather than on the same page.