LOTS of refactoring.
ADDED: cron to clean old db entries.
Readying for v2.3.0

git-svn-id: https://plugins.svn.wordpress.org/wp-simple-firewall/trunk@832989 b8457f37-d9ea-0310-8a92-e5e31aec5664
removed old file

git-svn-id: https://plugins.svn.wordpress.org/wp-simple-firewall/trunk@832990 b8457f37-d9ea-0310-8a92-e5e31aec5664