Adding Ranking Rules to rule based categories, part 1
Merge remote-tracking branch 'upstream/master'
refactor to support autocomplete core.
added several methods in the SearchServer interface to access the
autocomplete core
Adding Ranking Rules to rule based categories, part 2
Merge remote-tracking branch 'upstream/master'
Handling null pointer exception because of change in API from google collect to java utils
Merge pull request #34 from naveenhooda2004/master

Ranking Rule for Rule Based Category Changes
Merge remote-tracking branch 'upstream/master'