[mr2630] Fix randomly invisible creatures after mr2625
[ai-170] processBotCommand moved to PlayerbotHolder
[ai-171] rndbot add/rm/update BOTNAME console commands
[mr2631] use whitespaces instead of Tabs + initialize m_flags in constructor
[mr2632] Enable Mounts in Saron Instance + Tabs
[mr2633] Rework spells 26373, 26448 for full not hackly way
[mr2634] Calendar: remove expired events
* wait week before remove event. this useful for reuse (copy -> paste) events
[mr2635] Calendar: not form mail draft when this not necessary
[mr2636] Calendar: implement remove expired events and remap ids on core start
[mr2637] some style changes
[mr2639] Remove Hacks and implement Mark of the Fallen Champion from Saurfang Encounter

NOTE for Devs: Trigger Spell from 72408 -> 72409 can not hit Units without 72410, because of Target Aura Spell (72410)
[mr2640] Fix Resistence Calculation
GetResistanceBuffMods(positiv) - GetResistanceBuffMods(negativ) = 2xGetResistanceBuffMods(positiv)
because positiv - negativ = bigger positiv
Negativ GetResistanceBuffMods are stored in int32 and smaler then 0
[mr2641] remove double code Item - Druid T8 Restoration 4P Bonus
[mr2638] Calendar: fix deadlocks after remove event
* need rework lock system
[mr2643] Calendar: small rework
[mr2644] fix compile after 2636/2643. c++11 currently not in mainstream.
[mr2645] Fix typo.
[mr2646] Fix broken visibility update. close #1310
[mr2647] Fix visibility problem when object load to grid after player.
[ai-172] strange limit on attacker check removed