AOP-35 | add dynamic ai loader

[KlnSdr]

• implement a dynamic class loader similar to the #32
• create an interface which all ais have to implement
• put an example into an appropriate package

  review

• [ ] requirements per ticket definition are met or a reason was stated if they were only partially met
• [ ] code style was adhered to
• [ ] feature branche is rebased

[KlnSdr]

the loader was generified in #37

[KlnSdr]

• generified commons.ClassLoader even more
• added tupel class
• added ai loader
• each ai needs to have a nextMove method which takes a board as param and returns the coords to shoot at
• added common.BaseAi which already implements IAi with empty methods
  • all actual ais can just extend this class to avoid implemening unused methods
• added simple example ai that just traverses the board from top left to bottom right

[sbstnschkhn]

Dear Mr Schneider, I tested your AI example and it shot its shots the way it should. I don#t know what the methods onBeforeGameStart() and onGameEnd() do. Your Tupel class is a great idea. LG Sebastian

[KlnSdr]

• onBeforeGameStart should be called right before the game starts. my idea was that the ai would f.ex. load some data from disk that enable it to behave the way it should. i felt that the constructor wouldn't be the right place for such code.
• onGameEnd should be called at the end of a game. my idea was that an ai would analyze the past game and persist some data to disk