File search: match on subsequence rather than start of name
Order search results by score
Refactor; wire up R source object machinery as well
Better scoring
Tweak scoring a bit (don't give bonus on '.' for file extension)
Depending on 'j' unnecessary as all scores calc'ed on same query
Penalize less interesting files
More work on server side to return highest scoring matches
Merge pull request #154 from rstudio/feature/quick-find-on-subsequence

'Fuzzy' file finding -- search on subsequence