[.Shuggles.] Gatcha Versão 0.60

The Gatcha script can be used to give a random item upon paying a fixed price. It scans
the inventory of the prim it is in and randomly selects a prize. When an avatar pays the
given price, it delivers the prize to this avatar in a folder or standalone for single
items. The name Gatcha is chosen intentionally (see "Gotcha!"), but it is just the same
as Gacha :-)

All items whose names start with the prize name, e.g. description notecards or images,
are also included. Detailed configuration options:

- price to pay must be set in the object's description field
- access level all, group or owner - gives refunds in case a user is not allowed
- item type that should be given: objects, notecards, textures, all etc.
- other items whose names start with the prize name are given as well
- exclude list for items that shall not be given
- include list for items that are always included (e.g. store landmark or notecard)
- configurable sound that is played on giving the prize
- folder name of prize, uses object name + prize name if empty, not used for single items
- string that needs to be in the item's name to be considered a rare item
- chance that a rare item is really used when chosen (0-100%)
- optional config notecard, intended for creators of gatcha machines which want to
sell them, but keep them configurable without letting the script stay full perm
- configurable message texts, say as agent

The Gatcha script is full perm. It's licensed under the BSD license with the addition
that it must not be resold or otherwise given away standalone in parts or as whole. It
can be used in your creations as long as these license conditions are met. Please
remember to remove modify and either copy or transfer permissions on the script before
you put your products on sale.

Feel free to report bugs, request features, give feedback or write a nice MP review ^^
To update or redeliver a product, wear the included Updater and follow the instructions.
Store policies and info about custom scripting at my MP store and the inworld terminals.

Changelog:

- v0.55 ... Fixed bug for drawing rare items, don't use EXCLUDE_ITEMS and
INCLUDE_ITEMS with notecard, replaced list casts
- v0.56 ... No folder for single items, support and check no copy items