Major Backend/Parser push

-Added Challenge class and subclasses
-Removed the Character and Player classes and combined them into the
Entity class
-Added Chatmessage class (contains src and srcid of messages)
-Rebuilt Manager class - the current iManager is faulty and needs to be
redone
-Added Map class and its subclasses
-Added semi-functional parser - wip
-IParser was severely outdated and has been removed
Inf3-Client.csproj classpath update

updated the classpath after the previous push