Merge tag '3.6.5' into develop

Release: 3.6.5
Preparation for new development cycle after release 3.6.5
Include AUTHORS file
Update WordPress Tested
fix for mySQLi implementation in WP
Remove old PHP4 reference
Update WordPress tested
Version bump 3.6.6-rc.1
Version bump 3.6.6
Merge branch 'release/3.6.6'