libtorc-core: Fix TorcSetting row removal and insertion
libtorc-core: Properly fix TorcSetting row removal and insertion
libtorc-core: Refactor TorcNetworkedContext

- make singleton available globally
- TorcNetworkedContext is now a QAbstractListModel subclass
- TorcPeer metamorphosed inton TorcNetworkService - a QOject with
properties
torc-desktop: Add status tab and display other discovered Torc devices