Just fixing some warnings
[mr2626] Calendar: small improvements
Merge pull request #1307 from xarly/temp

Just fixing some warnings
More warning fixes
Merge pull request #1308 from xarly/temp

More warning fixes
Small fix
[mr2627] Fix broken teleport stunned player.

For example, ICC teleporter.
[mr2628] Improve instance entrance finder.testing
[mr2629] Fix spell 26373, 26448. thx to Zakamurite
* use right teleport spell 26448 - "Holiday - Teleport: Moonglade"
* fix target in 26448 via spell_dbc - set TARGET_SELF instead of wrong TARGET_DUELVSPLAYER
* remove processing 26374 - already fixed in spell_dbc
[mr2630] Fix randomly invisible creatures after mr2625
[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