Incorporated logo and flat color scheme

  *Couldn't get download .zip to stick to the bottom of the nav view
TODO:
  *Make the cursor at the end of the "input class code" field blink using css animations
  *Make notes button a flat bar that sticks to the top of the notes pane, hides the notes pane when clicked, and sticks to the top of the footer when collapsed so that it can be clicked again to open.