separate search and score sorting operation

[jbouzekri]

This pull request proposes to separate the search operation in a baseSearch method to give the ability to get the search results without always sorting by score.

[olivernn]

I'm not saying that this isn't something that will be possible in lunr, but I don't understand what the requirement for being able to get the results unsorted is? Could you explain your use case for this feature?

[jbouzekri]

It is not that I want it unsorted, it is more that I want to sort it in another order without having to do 2 sort operations.

For example :

search('text')
  .map(doc => my_database[doc.ref])
  .sort((function (a, b) {
       return b.publication_date - a.publication_date
   })