added LoggingIn.java which is the welcome screen and login screen for a customer or manager.  The layout is a CardLayout which allows to switch to different screens, or cards, as if there were multiple frames.  Needs work because I am still working on how to switch them; however, for now it just shows both cards at the same time
Merge commit '862dbdb4c20481988daad3dc53b528b566077f64'