minor changes
Added changelog file, Changed output/build directory, Refactored panel ui code from MenuButton to PanelWindow (simplifies new features), Added border in edit mode of panel items, Single menu window, Panel item dialog window title, Refactored simulation to seperate connection class (needs to be finished)
Merge branch 'master' of https://github.com/dankrusi/ExtPlane-Panel

Conflicts:
	extplane-panel.pro
	menubutton.cpp
	panelwindow.cpp