Added a new context menu item to allow setting sessions for multiple
instruments. Implementation not done yet.
Added another month in the vix expiration test.
Added NextBar method to TimeSeries.
Fixed an issue with cloning of continuous futures.
Fixed a couple of bugs with instrument editing.
Added the ability to choose the IB connection IDs for the historical and
realtime clients.
Fixed some bugs in the continuous futures generation and data handling.
More bugfixing in the CFD.
Updated version number.