Made env. sound falloff configurable thru engine/misc.txt using
key sound_falloff, the default settings value is 15 but can now
changed.
Minor update to stealth animation
Fixes deletion of saved games to use game_prefix if used.
This closes issue #406
Merge pull request #405 from hean01/master

A few fixes.
Merge branch 'master' of https://github.com/clintbellanger/flare-engine
Whitewind map.
Add the rotten tower to the whitewind map.
Add a second quest to Martigan. Find the rotten tower on whitewind!
Rotten tower quest: add another log entry for returning to Martigan.
The triggers to find the abandoned tower, yield a msg.
Allow events to drop multiple pieces of "fixed" loot

As an example, here's a loot event that will drop 10 gold all the time,
and then either Health Potion (id 1) or a Mana Potion (id 2):

```
currency,5,5,10,fixed;1,5,7,1,100;2,7,5,2,100
```

Note, 0 can be used in place of `fixed`.
GameStateTitle: ease of logic.
Simple copyediting
Merge pull request #1 from makrohn/whitewind

Improve language.
Merge pull request #409 from stefanbeller/master

GameStateTitle: ease of logic.
Merge pull request #408 from dorkster/bugfixes

Allow events to drop multiple pieces of "fixed" loot
Merge pull request #178 from stefanbeller/mapping

Adding a new map south east of the frontier plains. With a quest!
Merge branch 'master' of https://github.com/clintbellanger/flare-engine
Added env. sound to White wind map.