Merge pull request #1 from discoverygarden/modular

update
Merge pull request #65 from adam-vessey/non-sort-sorting

Create copy of string fields with non-sort/article components stripped.
Merge pull request #3 from discoverygarden/modular

update fork
adding stopwords.txt as per nigel
Merge pull request #66 from lutaylor/modular

adding stopwords
Additional filtering for sort fields.