* azerothcore + eluna done.
* Remove the Eluna single thread limit.
* Read Eluna Settings file.
* submodule change.
* fix(test) Ubuntu - Cant Link Library after Compile
* The ELUNA is disabled by default.
* remove submodule luaEngine.
* some change
* fix a error
* change cmake
* fix: some onplayerchat does not have hooks.
* Eluna: Add BG event Hooks.
* fix:cmake hook AFTER_LOAD_CONF not work.
* Remove the eluna switch.
* Remove some define in the core.
* fix conf file not read in the linux.
* eluna : change bg hook parameter type
* Remove TC log function call
* change bg hook OnBGEnd parameter type.
Note: to enable Eluna, the module is required
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