[s2690] Improve script of npc_kelerun_bloodmourn

Fix scriptdev2/scriptdev2#48 - Thanks to tarwyn for pointing
Improve Nazan and Vazruden script (first part)
[s2691] Improve Nazan and Vazruden script (second part)

Fix scriptdev2/scriptdev2#47 - Thanks to tarwyn and xfurry for pointing and supporting information

Change:
* Add support for nazan to dismount if his health drops below 20%
* Fix Nazan not attacking while he is supposed to fly (previous commit)
* Fix some possible FAIL glitches (previous commit)
[s2692] Implement Solakar Flamewreath Event in UBRS (Rookery)
[s2693] Minor Deadmines improvements

Close scriptdev2/scriptdev2#52

Changes:
* Some spell improvements to Mr Smite
* Improve Canon&Door event's timing

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>
[s2694] Fix unused parameter warnings
[s2695] Cleanup some scripts ported to eventAI
[s2696] typo from backport close #2

Signed-off-by: Salja <salja2012@hotmail.de>
[s2697] Allow Ossirian to use the Sand Vortex
Merge branch 'master' of https://github.com/mangosone/scripts