Deleted some libs

Before re adding them =<
Re-added MySql.Data (case sensitive)
Added SemaphoreSlim.WaitAsync extension

Added in Mono 3.0.8, adding it as extension for convenience. For
example, latest test version on Debian is 3.0.6.
Fixed NPC compilation under Mono (Linux)
Revert "Refactored quest methods to use safe and unsafe"

This reverts commit 35c209ff174bc97730c162f665007a4a41aab76a.
Renamed AutobanException to SecurityViolation
Switched the naming for Safe and Unsafe methods
Relaxed some bans
Merge branch 'master' into AutoBan