In object-oriented programming, the open/closed principle states "software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification"

http://en.wikipedia.org/wiki/Open/closed_principle
Training ninja

the new oop
Everithing is ok

Training ninja
ignore this
Merge branch 'master' of https://github.com/JamesJoyceTeam-TheNinjaGame/NinjaRPG.git