EventAI documentation

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Автор: cala


<pre style='white-space:pre-wrap;width:81ex'>EventAI documentation

Update and clean up EventAI documentation:
* Engrish
* 31 + 1 = 32
* Text align
* Add missing documentation for EVENT_T_SELECT_ATTACKING_TARGET</pre>


Подробнее... (https://github.com/cmangos/mangos-wotlk/commit/53472e935ac8007808f165a6faa25b8ac161b65b)