Merge pull request #3 from guruHub/master

Fixes issue with keys containing ':', now it gets as key everything after the first match.

* Restrict matching to the line containing the key.

* expires is a local variable.

* Fixed expires printing with human readable date.

* README with expire and TTL info. Now it selects on the expires instead of TTL.

Merge pull request #1 from bakins/master

add expires

* Added check for negative TTL for not found items.

* New sed pattern allows simpler code.

* Better sed pattern to match key.

* Added echoing the file also.

* Set correct command name on examples.

* Updated README with correct git clone URI.

* Initial commit.