Update discussion.md

- fixed typo
- roles 'moderator' and 'administrator' are explained as bullet points.
Clean up text of Order Confirmation E-mail.
Merge pull request #894 from edx/diana/confirmation-email

Clean up text of Order Confirmation E-mail.
Add Learning Tools Interoperability (LTI) blade.

LTI blade allows to include LTI components to courses.
Python integration, Jasmine and acceptance tests are included.
Merge pull request #910 from edx/alex/add_lti_to_rc

Alex/add lti to rc
cleanup copy on reqs, photo, and choose pages
modal functionality for edit name on vcerts
Verification: revising textarea reset formatting and increasing close modal control size
Prevent being able to click on disabled button in IE.
Enable display of course org, num in receipt page.
Merge pull request #913 from edx/ormsbee/certs_small_ux

Small UI fixes
Fix element name conflict
Merge pull request #915 from edx/jkarni/fix/textbook-upload

Jkarni/fix/textbook upload
Require that permission be given for Flash camera before we process snapshots.
Merge pull request #917 from edx/ormsbee/check_flash_video_permissions

Check flash video permissions before enabling next step
If user has previously selected a price, show it on the choose page
Merge pull request #918 from edx/diana/custom-price-fixes

Clean up - Add chosen price to the choose mode page
Update JS to reflect new link IDs to unbreak the top nav status indicator.
Merge pull request #922 from edx/ormsbee/fix_verify_progress_status

Fix verify progress status
Verification: revises UI header copy
Verification: changes formatting of billing address/info on receipt view