[12574] Implement spells for Mimiron encounter

Spell effects: 64402, 65346, 63027, 63667, 63681, 64841, 63382
Drop spells 63820, 64425, 64620, 64398, 64426, 64621 because they will be handled by script
[12575] Update for Mimiron encounter spells

Add targets limit and spell effect for spell 64623
Remove target limit for spells 63387 and 64531 because they proved to be wrong
Fix mistake for spell 65346; thanks LilleCarl for pointing. This will be handled by script
Finally add positive exception for spell 64402
[12576] DB Scripts SCRIPT_COMMAND_EMOTE

Add support to display a random emote.
If dataint1..dataintX is set to an emote, a random out of datalong1, dataint1..dataintX will be sued as displayed emote.

Thanks to grz3s for testing
[12577] Add positive exception for spell 56099
[12578] Implement spell effect 45625
[12579] Change startup logo. Thank to all involved.
[12580] Improve chat channel code:

- Remove unnecessary calls to GetPlayer
- Invert "if" statements to reduce nesting
- Cleanup code

Signed-off-by: stfx <stfx@hotmail.de>
[12581] Implement 2 chat channel responses

- CHAT_PLAYER_NOT_BANNED_NOTICE
- CHAT_PLAYER_INVITE_BANNED_NOTICE

Signed-off-by: stfx <stfx@hotmail.de>
[12582] Fix reloading horde controlled capture point

Negative value of 0 (CAPTURE_SLIDER_HORDE) is still 0

Part of cmangos/issues#53
[12583] Add a configurable delay between when a creature respawns and when it can aggro due to movement.
[12584] Rename m_respawnAggroDelay to make it more generic
[12585] Fix for Finger of Frost 100% proc is corrected and stack also correctly decreased

Thank to zkillertheman & VladimirMangos

This close pull request https://github.com/cmangos/mangos-wotlk/pull/97
[12586] Fixed issue with PCH not working on some versions of GCC

Since some versions of GCC doesn't output patchlevel on -dumpversion the PCH check can fail.
Bug: https://github.com/cmangos/issues/issues/81