Cleanup CfgLoot

There is no point in having CfgBuildingPos.hpp in dayz_epoch_b too. It
was identical to the one in dayz_code and can be included in the mission
from there.

@icomrade couple questions:

1. Why keep a CfgLootLegacy? I know they are very different formats, but
it will just make things messier and more confusing. Also it will be a
PITA to maintain and update two different sets of loot tables in the
long run. I don't think catering to lazy admins is a good enough reason.
It's not that hard to convert to the new format.

2. Why not use the new _DZ weapon classes in the loot tables like
PDW_DZ, AKM_DZ, etc.?

3. Why not use the new box names like DZ_AmmoBoxRU, DZ_AmmoBoxUS,
DZ_MedBox,  etc. in the loot tables?

4. Why remove the attachments from the loot tables?

SQF/dayz_code/Configs/CfgLoot/CfgBuildingPos.hpp

@@ -1,4 +1,10 @@
-// Buildings - redifined here so it does not break mission loot table includes
+/*
+	If using DZE_MissionLootTable = true; without changing anything in lootPos then use 
+	an include instead of copying the files to your mission.
+
+	#include "\z\addons\dayz_code\Configs\CfgLoot\CfgBuildingPos.hpp"
+*/
+
 #include "Buildings\Residential.hpp"
 #include "Buildings\Boat.hpp"
 #include "Buildings\Castle.hpp"