* loaded all distinct script names into one vector at server startup
* added custom loaders to convert the script names to indices
* converted all the script lookup functions to use the index instead of the name
Removed unnecessary database queries in some command handlers.
Replaced them with access to cached data or queries for only the needed data.
Move database access in gossip select code to less often called place.
* Rename 2 creature_template fields to more clean names and related code update also.
* Use enum values instead raw values for type_flags, use halper functions instead code repeating.
* Move tamed pet creating code to new function.
