Add class TellStick
Add firmware to the products as resource
Link plugin against libftd2xx
Add properties to the controller object for showing the upgrade status
Load class TellStick for TellStick controllers
Add qml item StateLabel
Add aml item ControllerUpgradeDialog
Add option to update firmware for TellStick
Load class TellStick for TellStick Duo also
Check the current firmware version
Add support for flashing TellStick Duo
Add headers for ftd2xx, needed at least in Windows
Add icon for upgrading TellStick
Update icon for Controllers plugin
Add firmware 10 for TellStick Duo
Merge branch 'controller-upgrade'
Enable the Controllers plugin as default. This closes #86