Update 1.3.5rc1

Major changes
==========
* Removed client admin panel and now only slash commands are used
* Changed many public types to private types becouse they was only
loaded once
* Added credits file
* Fixed some serious bugs in trade and party
* Fixed effects bound to target and optimized particle engine a bit
* Fixed alert messages
* Removed loading of constants from server config.ini to speed up code
* Fixed minor bug with clicking buttons in main menu
* Fixed Item Cost Overlaying Item Desc (Credits: Render)
* Fixed shop close button not working (Credits: Render)