Fix for broken sound file support caused by last keen update. May break economy mod sound fx but otherwise functional

No new features.
Updates internal help text to mention portable NPC zones. ( emawind84 )

Updates internal /ver reply to reflect that new functionality was added.
(Due to the previous changes which implements the new feature: Mobile NPC zones that follow beacon, and adding limit command support to NPC zones too.)

Internal id string not changed as no database structure changes.

More Cleanup and refactor by emawind84 -
Changed listed:
Added Monospace font support
New npczone command to link market to beacon /npczone add name size
Cleanup and refactoring
Changed quantity format on /pricelist result remove 4 digits after decimal point

Update merging fixes by Emanuele https://github.com/emawind84
* LCD heading alignment
* LCD title centering
* replaces depreciated text box methods
* Adds limit feature to NPC markets as well++. (setlimit) not just setbuy or setsell


++ Note: these changes have not yet been added to the support documentation

Update to compliment keen economy:
* Adds support for trading power kit, med kit, data pad etc
* Adds currency exchange - you can now (by buy/sell command) convert between Keen's "Space Credits" at any NPC zone - be warned, space credits have a steep exchange rate, you can buy about 94 of them for one Frontier Credit - so if you are a Frontier Economy Tycoon, you are probably very very rich...
* Adds "supply" category to LCD price list - this is the new keen items.
* Admins can configure the "exchange rate" by setting the buy/sell price of the item "Space Credit" - note space credit is exempt from price scaling, and has unlimited stock a it is a currency item.
* Updates the chat line help for the admin /npczone to show addhere and movehere too.

NOTE: you may need to remove and addhere existing trade zones to auto enable the new items for sale.

Bug Fix
* Fixes No chat commands working due to LanguageDescription used by localisation now being renamed MyLanguageDescription.
Special thanks to Malware for spotting that fix.

Possible workaround for LCD keywords issue. No new features.
Solution is to move your LCD keywords to the same text box as [economy] instead of using the other text box
i.e. [economy] ore stock

* Merges LCD formatting change requested by community member "prosa100"
* Implements a /tz export ZONENAME function to allow pricing to be exported by cut/paste from LCD which removes the ownership check allowing any valid zone pricing to be scanned up, variation of merge request by "prosa100" changing undocumented load function.

Screaming Angels Hotfix:
1: Torch Fix
2: Performance tweaks

Minor tweak to default gas pricing so that a tank of gas isnt worth millions