Sending email notifications when there is new activity

[grasael]

• No additional UI should be needed for this; will have to keep track of changes in questions and posts
• Email should have fixed titles based on the type of activity
• Estimated effort: Moderate
• Dependencies on tasks: High, will most likely need to work on after other tasks are done
• Assignment: Grace
• Milestone: Sprint 1
• Acceptance Criteria: A successful user study where the user receives an email due to updates on their post