Add possibility to connect from one manager instance to multiple client instances simultaneously

[AenBleidd]

It would be nice to have an ability to connect several client instances to one manager instance because it is quite hard to monitor several devices (7 in my case). Also it would be nice to have some kind of connection managing system which can automatically connect manager to known devices with saved passwords. Of course this will require a huge changes both in architectural and interface parts. So as from my POV this task can be splitted into several smaller tasks: 1 - Allow manager to be connected to several clients simultaneously. 2 - Change GUI to show all devices (e.g. in a tree view). 3 - Allow manager to configure all devices simultaneously. 4 - Allow manager to configure every device separately (e.g. different update task status time). 5 - Allow manager to save list of devices to connect them automatically with or without (on users choice) asking password to each of them (maybe add some kind of master password which can be used to encrypt/decrypt file with devices and their passwords) and manager start. 6- It would be nice to allow manager to connect to android clients also but this will require changes on Android client part too.

Contact point: @AenBleidd

[Toby-Broom]

This is possiable with BoincTasks from eFMer