Version 1.0.0

* Fixed a data leak in `expireLeaderboard` and `expireLeaderboardAt` to also set expiration on the member data hash.
* Version 1.0.0 since we've been at feature parity from the beginning with the Ruby and Python leaderboard libraries.
Merge pull request #6 from agoragames/version-1.0.0

Version 1.0.0