fixed error in IssuesHelper > issue_poster_name unknonwn method admin
boostrap styling for issue form
styling of response form
styling of show issue (in progress)
styling of show issue (in progress)
reverted change of issue_poster_name to current_user.admin
resolved conflict in issues_helper
disable submit for issues and replies unless required field has values
issues list styling
hack for removing disabled submit when updating an issue
added handraise icon to global nav
handraise favicon
auto-link urls in issues and replies
display time ago created for issues and replies
hide response count on issues list if no responses
display gravatar image for current_user
fixed conflict in application.html.erb
redirect to root rather than issues on login
display course name in app header
set admin permissions if github name is found in instructor array