Merge pull request #13 from pickypg/feature/hostname-then-timestamp-11

Flip hostname and timestamp in filename.
Adds _cat/shards?v

Adds `/_cat/shards?v` as `cat_shards.txt` to the output.
Merge pull request #15 from pickypg/feature/cat-shards-14

Adds _cat/shards?v
cat_recovery.json now 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`.
Merge pull request #17 from pickypg/feature/cat-recovery-16

use _recovery and change cat_recovery.json to cat_recovery.txt
Adding the target node to the output name

Also modifies the debug output to clarify the ES host and port, as well as the  node name that is used.
Escaping quotes in PowerShell script