Moved commands to separate modules
core/event/*.?pp: Hide fields, added getters
VertexArray::draw(): 'else if' -> 'switch'
core/event/*.?pp: virtual d-tors
Removed some '#include's from core/core.h
core/core.hpp: Removed few more includes
Fixed compilation error in visualizer/vertexArray.cpp
Added dummy core/eventView.?pp implementation