Core/Scripts/DB: move npc_gregan_brewspewer to DB

[ghost]

Changes proposed:

• Remove the script npc_gregan_brewspewer, thereby removing the hardcoded text:

#define GOSSIP_HELLO "Buy somethin', will ya?"

• Move all gossip handling to DB (gossip texts already exist in TDB)
• Update the core script file zone_feralas.cpp with correct content / SD info

Target branch(es): 3.3.5 / 6.x (Select the branch(es) affected by this issue)

• 3.3.5 (the questline was removed from World of Warcraft in patch 4.0.3a)

Issues addressed: Updates mysterious-static#2 and the list of hardcoded text http://pastebin.com/x7wZLpxH

Tests performed: (Does it build, tested in-game, etc)

• builds without any problems in VS2013 Update 5 (source code removal + verified SQL queries)
• works as intended in-game (GM commands or wall jumping is required to complete the full quest)

Known issues and TODO list:

No issues in this PR, only a testing "challenge" when the player needs to jump wall to get Evoroot

NOTE If your Pull Request is SQL only create a ticket instead

• this PR contains both SQL and C++ script code (removal)

SUGESTION If your Pull Request contains SQL give it one imposible date, for example 9999_99_99_99_database.sql on that way it will be free on merge.

• 2016_05_19_99_world.sql is a fairly unlikely file name for the SQL included.

[ghost]

Regarding my SQL change to the npc_text table,

UPDATE `npc_text` SET `BroadcastTextID0`= 0 WHERE `ID`= 2433;

I have included the following explanation inside the SQL file:

Remove broadcast_text link from Gregan's default gossip "What can I do for ya?"
to enable npc_text.ID 2433 "Hi there! The name's Gregan. What can I do for ya?"
This mixup is caused by invalid duplicate use of BroadcastTextID0 = 8275,
duplicate of npc_text.ID 5695, used by NPC entry 5167 Fenthwick <Rogue Trainer>
Lookup queries to verify this information:

SELECT * FROM `npc_text` WHERE `BroadcastTextID0`= 8275; -- (ID 2433 + 5695)
SELECT * FROM `gossip_menu` WHERE `text_id`= 5695; -- (4561,5695)
SELECT * FROM `gossip_menu_option` WHERE `menu_id`= 4561; -- (id 0,1,2,4) "I'm lookin' for rogue trainin'."
SELECT * FROM `creature_template` WHERE `gossip_menu_id`= 4561; -- (5167 Fenthwick <Rogue Trainer>)

If you don't want this in the SQL file, I can remove it. I included it because I felt it needed to be explained.