Properties of CommandBase are not serialized during WCF call

CommandIdentifier and KnownVersion are not serialized when calling
CommandWebService service. Fix the issue by using DataMember attribute
Merge pull request #99 from jackliusr/master

Properties of CommandBase are not serialized during WCF call
Merge pull request #98 from theBoringCoder/master

Added the MyNotes 2012 Sample