Converted Big Foot Burden Quest's action scripts to meta. Fixes on achievements lib. Added 10 more achievements to game.

Added achievement "Allowance Collector" when using 50 piggy banks.
Fixed function playerExists in customfunctions.lua. It was always returning true.
Some minor changes in Achievements Lib.

Converted Big Foot Burdern's Quest creaturescripts to meta.
Fixes and changes to achievements lib.
	Fixed a bug with a nil variable
	Added the 'secret' option to some achievements
Added a new creaturescript. This new script will work with the 'onKill' event and will support misc kills (Bosses, creatures quantity, etc). It is registered with the name of 'MiscKill'
Added the following achievements to the game:

	Askarak Nemesis (Obtained when killing 100 Askarak Prince)
	Back from the Dead (Obtained when slaying Zanakeph)
	Back into the Abyss (Obtained when slaying Thul)
	Bibby's Bloodbath (Obtained when slaying Bibby Bloodbath)
	Blood-Red Snapper (Obtained when slaying The Snapper)
	Choking on Her Venom (Obtained when slaying The Old Widow)
	Cocoon of Doom (Obtained when slaying Bloom of Doom) [Note: Slaying or dealing damage? Idk if that creature can be killed]
	Crawling Death (Obtained when slaying Fleshcrawler
	Death Song (Obtained when killing 300 Deepling Spellsingers)
	Deer Hunt (Obtained when killing 400 White Deers)


Note that the achievements were added following the description found at www.tibia.wikia.com
More achievements will be added eventually.