Start moving peer grading to xmodule

common/lib/xmodule/xmodule/js/src/peergrading/peer_grading.coffee

+# This is a simple class that just hides the error container
+# and message container when they are empty
+# Can (and should be) expanded upon when our problem list 
+# becomes more sophisticated
+class PeerGrading
+  constructor: () ->
+    @error_container = $('.error-container')
+    @error_container.toggle(not @error_container.is(':empty'))
+
+    @message_container = $('.message-container')
+    @message_container.toggle(not @message_container.is(':empty'))
+  
+    @problem_list = $('.problem-list')
+    @construct_progress_bar()
+
+  construct_progress_bar: () =>
+    problems = @problem_list.find('tr').next()
+    problems.each( (index, element) =>
+      problem = $(element)
+      progress_bar = problem.find('.progress-bar')
+      bar_value = parseInt(problem.data('graded'))
+      bar_max = parseInt(problem.data('required')) + bar_value
+      progress_bar.progressbar({value: bar_value, max: bar_max})
+    )
+    
+
+$(document).ready(() -> new PeerGrading())