Remove outdated notes in Populate ES Doc
Update Populate ES documentation link

New link points to current documentation on installing Elastic Search
Update 'run the script' ES Documentation

The documentation specified to run `movecrashes.py`, but said it was in `...scripts` not `scripts` and that it was called `movecrashers.py`.
Merge pull request #2203 from bramwelt/update-elasticsearch-documentation

Update Populate Elasticsearch Documentation