Add intro and section on contributing using demo data
Add intro and section on contributing using demo data

studentinsights/studentinsights,studentinsights/studentinsights,erose/studentinsights,jhilde/studentinsights,erose/studentinsights,jhilde/studentinsights,erose/studentinsights,jhilde/studentinsights,erose/studentinsights,studentinsights/studentinsights,studentinsights/studentinsights,jhilde/studentinsights