Adds a recipe for ttf-orbitron and makes asteroid-launcher depend on it for the new scific watchface

Adds a recipe for ttf-raleway and makes asteroid-launcher depend on it for the new default watchface

Adds a recipe for ttf-roboto and makes asteroid-launcher depend on it for the upcoming default watchface

lrelease seems unable to read wildcards in a .pro file, so we directly
tell it to just translate all translations

asteroid-theme-moka: create the icon-system-usb.png and icon-system-charging.png symbolic links to have a nice icon in notifications

Now that we use meta-qt5's jethro branch, libconnman-qt5 is provided so we don't have to maintain libconnman-qt anymore (also fixes an asteroid-launcher warning message about MeeGo.Connman)