Internal. Add 'ExchangePtr' function
Internal. Add helper defines (empty/nonempty string)
Refactoring. Use RConStartArg as argument in LoadConsoleBatch and ParseGuiArgs
Refactoring. Move 'struct CommandTasks' to separate cpp/h
Issue 1660: Support '/NoSingle', '/Quake', '/NoQuake' switches in Task parameters.

    They used while starting new Task from existing ConEmu instance.
Quake window can't be hidden by taskbar button click.
140815 release files