Give students and employers an opportunity to post messages
Merge pull request #594 from teamleada/mark-enable-messaging

Give students and employers an opportunity to post messages
Add styling for unread indicator
Cascading destroying of a conversation
Add some after_create hooks to trigger unread notifications
Add unread conversations count
Style the new navbar
Add icons for common tasks with tooltips
Add large header to invites page
Fix mobile expand button
Add profile photo to top bar
Slight modification to the height
Partial for the messages module
Style for the new messages module
More style for the messages module
Style for the conversation module
Highlighted and unread states
Add 'send new message' and 'see all' buttons
Merge pull request #600 from teamleada/mark-unread-messages

Messages module in the header
Conversation titles should show the full name of users when it's just a conversation between the two users