Improve Simple Search ranking

[VladimirAlexiev]

(Related to #73)
Try simple search for "Universitetet i Agder"

• It returns in the first 10 Author, Funder, Source; but not Institution:
  
• It first returns https://semopenalex.org/work/W2476008253 just because it has this in "escription:
  Masteroppgave i okonomi og administrasjon - Universitetet i Agder 2011 - Masteroppgave i informasjonssystemer- Universitetet i Agder 2011

Need to improve the ranking based on a combination of these criteria:

• how well the search string matches. A full match (in name, altName) is preferable to a partial match (in description)
• in which field it is matched: name> altName> title> description