Display defaults with help to reduce complications for new users.
Display defaults with help to reduce complications for new users.

Instead of needing to type:
`python logstash_index_cleaner.py -\-host localhost -\-p 9200 -p logstash- -d 30`
You could just type:
`python logstash_index_cleaner.py -d 30`
And have the same thing.

HonzaKral/curator