Factor out the initialization setting up the environment and headers in
the RVCT/GCCE toolchains.
Modify the RunControl to be able to support different package
building/signing processes.

Users can specify a S60 SDK root for Qt for Symbian versions
now.

- Introduce a communications device type flag, add stubs for
  Bluetooth to serialdevicelister and pass the device type
  in new struct CommunicationDevice along to run configuration
  and debugger start parameters (overriding the debugger settings).
- Give the s60devices::Device a tooltip in the settings page

At the moment you need to close and reopen the preferences dialog though.