fix VirtualJoystickView class and make visualizationView possible to change views
add dashboard class
fix the bug occured when change the visualization view
add App
add the function of calling start/stop/list service
once all delete(I take a mistake)
add again
change a function if the application is launched from app_chooser
back to the app_chooser screen
transition from app_chooser to master_chooser
make robotapp directory for app_chooser
display the master status
add class for reading QR code
add a dialog to inform starting robot
update copyright
remove extra files
remove extra files
change the UI of turtlebot_dashboard
add method for map_manager application
add name resolver to RosAppActivity