Version 1.5.1 Release

* Added missing code documentation and fixed typos (https://github.com/bmarshall511/wordpress-zero-spam/issues/64)
* Fixed issue with settings not getting initially saved when the plugin is activated. (https://github.com/bmarshall511/wordpress-zero-spam/issues/69)
* Added ability to auto block spam IPs (https://github.com/bmarshall511/wordpress-zero-spam/issues/71)
* Added paging to spammer log and blocked IPs (https://github.com/bmarshall511/wordpress-zero-spam/issues/60)
* Added additional stats and graphs (https://github.com/bmarshall511/wordpress-zero-spam/issues/75)
* Fixed issue with comment moderators not being able to reply to comments (https://github.com/bmarshall511/wordpress-zero-spam/issues/74)