cqlsh invocation in contextual_data.sh robustness.
make get-status keywordize JSON from status.
Merge pull request #117 from MastodonC/fix-get-status

make get-status keywordize JSON from status.
Merge pull request #116 from MastodonC/fix-contextual-data-listen

cqlsh invocation in contextual_data.sh robustness.
Web UI for downloading template with data.

- Do not return 404 for uploads, return empty list instead.
- Make download with data a button.
- Return edn when queued download. Add alerts.
- Add downloads ns and add new routes for downloading files and statuses.
- Add subdirectories for storign files in s3
Fix file leakage and tidy up.
Fix typos.