Core/CharDB Cleanup: alter corpse table making column names lowerCamel and move all queries to prepared statements.

NOTICE: column can be named `guid` only if it represents character guid. All other guids will be renamed to reflect their purpose (like corpseGuid in this specific case)

src/server/game/Entities/Object/Object.h

@@ -336,6 +336,7 @@ class Object
 
         void _InitValues();
         void _Create (uint32 guidlow, uint32 entry, HighGuid guidhigh);
+        std::string _ConcatFields(uint16 startIndex, uint16 size) const;
         void _LoadIntoDataField(const char* data, uint32 startOffset, uint32 count);
 
         virtual void _SetUpdateBits(UpdateMask *updateMask, Player *target) const;