Extracted IOptions and OptionsWindowViewModelBase.
Added CanBeNull and Notnull.
Added CanBeNull and NotNull to Xbrt.Core
Added CanBeNull and NotNull to Xbrt.Numerical
Added CanBenull and NotNull to Xbrt.SuperTerminal.
Added CanBenull and NotNull to DigitalPulseProcessor.
Removed unused classes.
Added CanBenull and NotNull to Presentation.
Added NotNull and CanBeNull to other projects.
cosmetic changes.
Thank you, R#.
Merge branch '20140618_Refactoring_ControlPanel' into developement