Moved ConcurrentNotifierBlockingList to new Collections folder.
Added ObservableDictionary.
Added new GUI elements in server tab to show the connection status of
the external data sources.
IHistoricalDataSource and IRealTimeDataSource must now implement
INotifyPropertyChanged (aimed at the Connected property).
Data brokers now use ObservableDictionary to hold the data sources. This
allows updates to the UI when the collection changes.
Yahoo data source now implements INotifyPropertyChanged.
MySQLStorage data source now implements INotifyPropertyChanged.
MySQLStorage data source now implements INotifyPropertyChanged. Added a
timer to update the connection status.
Quandl data source now implements INotifyPropertyChanged.
Bbg data source now implements INotifyPropertyChanged.
Real time sim data source now implements INotifyPropertyChanged.
HistoricalDataBroker now uses ObservableDictionary to hold the data
sources.
CFB now implements INotifyPropertyChanged.
SqlServerStorage data source now implements INotifyPropertyChanged.