Modularize the framework we have

[Unihedro]

Our code is very messy at the moment. AbstractBot holds both the message queue and manages the listeners, while the code that handles the connection is spread everywhere. Reliable development is hindered, so I propose that we take some time to fix up the spaghetti code and improve the object-oriented design of JavaBot, bearing in mind the following concepts from SOLID:

• Single responsibility
• Open/closed
• Liskov substitution
• Interface segregation
• Dependency inversion

Yeah... That's all I have to say for now.

[Vogel612]

Would love to get a review on 6580df1 in reference to the decoupling (and the JavaDoc I wrote). I personally think it's fine that a Bot manages a messageQueue and his own listeners. Anything else would require moving the MessageListener functionality into a Bot itself.

[Vogel612]

Closing this issue, since pull-request #16 is now merged.