Update 3.3.4

//Changes 3.3.4://
* Add an isLogged column in mySQL
* Add a maxLoginPerIp
* Add a maxJoinPerIp
* Add a way to force kick after register
* Add a way to force login after register
* Update session correctly
* Fix Change Email command
* Fix some perm problems
* Fix some problems with email sending
* Remove some dead code
* Add a way to control spawn priority, by default , in order, it is :
authme,essentials,multiverse,default