Refactored the code so that it's moer dynamic

[legovaer]

There are several changes here:

• I've split up the code so that it's more OOP oriented
• There is now a class called NikoHomeControl that provides the general functionality (and ensures the backwards-compatibility)
• There is a new class called NikoHomeControlConnection that interacts with the system using Netcat
• There is a new class called NikoHomeControlMonitor which will listen to the system and will output all updates
• The README.md file has been updated according to this new information