Update discussion.md

- fixed typo
- roles 'moderator' and 'administrator' are explained as bullet points.
Basic first commit of Photo ID Verification model and test code
Add logging to save item
Bare bones outline of ID verification templates
initial rough skeleton for verification flow
adding some standard sass bits to LMS and bare bones sass for verification
added font variables for LMS, more sass for verification
initial commit of shopping cart and cybersource integration
added shopping cart list template, embedded form
add parameterization of cybersource creds
Move shopping cart from session into model/db
add Validation function for cybersource receipt POST
add Order model fields for receipt generation
factor out cybersource processor from cart
Lots more verification of CyberSource reply + receipt generation
about page changes, refactor processor reply handling
Add in new VerifiedCertificate order item
Pull CyberSource values from environment variables
when in a dev environment.
Remove enrollment_cost from course_module
Some cleanup fixes to get verified certs working.