A few additional commands, with an edit to *getinventorylist;

Add a few commands along with their use syntax to script_commands.txt
*getcartinventorylist;
*checkbound;
*instance_check_guild;

As well, as an edit to *getinventorylist; to push the equip slot the item is equipped to instead of 1 or 0. It will push the number corresponding to those listed in const.txt
Documentation doesn't specify what we should expect if no binding type is passed (since it's an optional argument), nor it does say what happens if we pass 0 (which seems to be accepted according to the code below, but it has a funny result i.e. it doesn't do much)