[MoneyManager] Windows now use appicon.
[MoneyManager] Updated MenuFile-Key.
[Resources] Updated strings.
[Menus] Adding several MenuItems.
[App] Allowing shutdown over MenuExit.
[AppInfo] Removing comments in AssemblyInfo.cs.
[AppInfo] Remove unused usings in AssemblyInfo.cs.
[Resources] Update AboutLicense text.
[Windows] Reorder params in Windows.
[Contribution] Added Contributing guidelines.