* few script changes; added new func "ScriptExists".
* started an extractor tool; using StormLib (thx to Ladislaw Zezula!). for now convert some dbc files to scp. more stuff will follow.
* some changes to the realm/world connect code; still needs a rewrite.
* support conf parameters for GUI (check conf/gui.conf/gui.conf[.default] )
* fixed exception at DefScript:substr when called with empty string
* added 3 new functions: uppercase, lowercase, random[,<min>] <max>.
* added some better debug output when an incorrect script is loaded
