Added class “Settings” to safe the chosen settings in the FlipsideViewController
Settings is a singleton pattern, so data will be safed if the flipsideViewController is deallocated, but not if the app is restarted.
DDCMainViewController:
	Splitted the TextField into two textfields so that the keyboardstyle can be selected as numberpad to prevent illegal input
	If the “set scale” button is pressed, the string with the data is sent to the BLE Device
DDCFlipsideViewController:
	TapGestureRecognizer to check wether the user has pressed outside of the textfield to dismiss the keyboard
	Implemented that the settings are safed in the Settings object.
	Added ability for user to remove table view rows.
Disabled the ability to change the interface orientation