Update to latest DYE, to support building virtualenvs with a specific python version.
Fix support for testing ElasticSearch indexes.
Fix sorting by funder.

Add a non-analyzed version of the funder name field to allow ES to sort correctly.
Fix searches containing the word NOT.

This was completely broken before. It's still a huge bodge. Don't expect
it to work properly.
Merge branch 'master' of github.com:aptivate/360giving-demos