RocketTurrets 2.1.0

As requested, I have added an option to let the turrets have infinite ammo

I also changed the way the plugin checks if the player is authed to the turret, this should increase performance somewhat

• Fixed some typos in regards to the language file and sending some messages. I highly suggest generating a new configuration file when applying this update

• Added support for Remote Turrets http://chaoscode.io/resources/remote-turrets.50/

• Added config option to change the amount of damage done to the heli

• Added config option to return upgrade cost when the turret is picked up
• Added config option to return upgrade cost when the turret is downgraded back to a normal turret
• Fixed versioning
• Fixed downgrading turrets to normal

• CCTV camera models will no longer despawn
• Fixed the bug which would not allow you to return a AA turret to a normal

• Fixes to several things i left out in regards to permissions
• A new permission has been added -> rocketturrets.use players need this permission to see the /turret menu or use any of the features

• Anti air turrets have been added as a new kind of turret. You can create them by doing /turret antiair (now permission based)
• default permissions changed, they are now rocketturrets.rocket & rocketturrets.antiair
• Anti air turrets shoot heat seeking rockets that will seek a helicopter
• Added configurable damage amount done to the heli
• Updated the /turret menu, options for upgrades will only show if you have the correct permissions. (this also includes a language file update, so make sure to generate a new language file)

• (hopefully) Fixed an issue to do with OnItemAddedToContainer
• Added a "cleaning" timer to clean the itemCache incase items were not being removed
• Added base code for anti-air turrets (this feature is still not fully implemented and has been commented out for the time being)