Add basic usage info on welcome page

[pwilkins]

Basic usage information would help a new user. Not the "how", but the "why". For example, do you create a repository for each course, or a single repository for multiple courses? A simple button that opened a "help" panel would do.

Source: Mary Ellen Wiltrout's Notes
https://docs.google.com/document/d/10iJdumDyhArCXjZVMVAtcYmpCzzqZYcsI7B9LxDg0m8/edit?pref=2&pli=1

@pdpinch