updated receiver and sender apps
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.
Added license text.