Make commit calendar size depend on window size

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/javascripts/calendar.js.coffee

@@ -25,6 +25,7 @@ class @Calendar
         30
       ]
       legendCellPadding: 3
+      cellSize: $('.user-calendar').width() / 80
       onClick: (date, count) ->
         formated_date = date.getFullYear() + "-" + (date.getMonth()+1) + "-" + date.getDate()
         $.ajax