fix(Bluetooth): make connect function an observable to maintain full functionality
fix(Bluetooth): make connect function an observable to maintain full functionality

closes #154

xueron/ionic-native,driftyco/ionic-native,driftyco/ionic-native,klirix/ionic-native,xueron/ionic-native,xueron/ionic-native,ramonornela/ionic-native,ramonornela/ionic-native,xueron/ionic-native,ramonornela/ionic-native,driftyco/ionic-native,klirix/ionic-native,ramonornela/ionic-native,klirix/ionic-native