Changeset 9286

#2018:

• added new methods to the interface IStringConvertibleMatrix as well as two structs. Also the event ItemChanged has been changed to ItemsChanged
• class ValueTypeMatrix now implements IStringConvertibleMatrix instead of the classes which inherit from it
• small changes have been applied to a lot of classes to correctly implement the changed interface IStringConvertibleMatrix
• solution file, Build.cmd and PreBuildEvent.cmd have been added