Search improvements

Searches use mod atom as well as name. Searches consider separators such as -, _ and / to be equivalent to a space. Searches treat multiple words in the query as separate parts of the same word, instead of separate queries Searches remove characters such as " - " and ":", as they are unlikely to be included in the search key, but may exist in names and descriptions

Search results display all versions and their stability, as well as use flags (and texture sizes). Search results display enabled/disabled use flags for the installed mod.