use _recovery and change cat_recovery.json to cat_recovery.txt

Changes `cat_recovery.json` to `cat_recovery.txt`, as it is not JSON-structured data. This also makes both echo statements match as `_cat/recovery`.

- Adds usage of `_recovery` (as `recovery.json`) when using ES version 1.1+.
- Limits usage of `_cat/recovery` to only be used on ES 1.0.x.
- Modified version to match current release.

Closes #16