Merge pull request #67 from thompsona/edits

No instructions, comment lines show comment on hover
Input field is displayed as a tab
New comment expands vertically on click to show entire thread.
Dashboard for each video at /confusion/video_name
Merge pull request #70 from thompsona/confusionDashboard

Dashboard for each video at /confusion/video_name
Help dialogue on hover over help button
Merge pull request #71 from thompsona/helpButton

Help dialogue on hover over help button
Newest message is displayed as a folder-like tab. Clicking on it shows entire conversation.
Merge pull request #72 from khempenius/tabbedInputField

Tabbed Message Display
Seeks correctly on timeline
Merge pull request #74 from thompsona/seekToX

Seeks correctly on timeline
Toggle-style help button
Merge pull request #75 from khempenius/toggleHelp

Toggle-style help button
Demo version
Merge pull request #77 from khempenius/messageCount

Demo version
Fixed comment submission
Merge pull request #78 from khempenius/submitComment

Fixed comment submission
Timeline paint scale corrected