patch for displaying days in gantt chart of Redmine

fix_gantts.patch

diff --git a/app/views/gantts/show.html.erb b/app/views/gantts/show.html.erb
index f8f25be..80884c6 100644
--- a/app/views/gantts/show.html.erb
+++ b/app/views/gantts/show.html.erb
@@ -76,12 +76,17 @@
 
   headers_height = header_height
   show_weeks = false
+  show_week_day_top = false
   show_days  = false
+  show_day_num = false
 
   if @gantt.zoom > 1
     show_weeks = true
+    show_week_day_top = true
     headers_height = 2 * header_height
     if @gantt.zoom > 2
+        show_week_day_top = false
+        show_day_num = true
         show_days = true
         headers_height = 3 * header_height
     end
@@ -170,7 +175,7 @@
 <% end %>
 
 <% ###### Weeks headers ###### %>
-<% if show_weeks %>
+<% if show_week_day_top %>
   <%
     left = 0
     height = (show_days ? header_height - 1 : header_height - 1 + g_height)
@@ -208,7 +213,7 @@
     %>
     <%= content_tag(:div, :style => style, :class => "gantt_hdr") do %>
       <%= content_tag(:small) do %>
-        <%= week_f.cweek if width >= 16 %>
+        <%= week_f.day if width >= 16 %>
       <% end %>
     <% end %>
     <%
@@ -218,6 +223,28 @@
   <% end %>
 <% end %>
 
+<% ###### Days Num headers ###### %>
+<% if show_day_num %>
+  <%
+    left = 0
+    height = g_height + header_height + 17
+    wday = @gantt.date_from.cwday
+    day_num = @gantt.date_from
+    (@gantt.date_to - @gantt.date_from + 1).to_i.times do
+    width = zoom - 1
+  %>
+  <div style="left:<%= left %>px;top:19px;width:<%= width %>px;height:<%= height %>px;font-size:0.7em;<%= "background:#f1f1f1;" if wday > 5 %>" class="gantt_hdr">
+  <%= day_num.day %>
+  </div>
+  <%
+    left = left + width+1
+    day_num = day_num + 1
+    wday = wday + 1
+    wday = 1 if wday > 7
+  %>
+  <% end %>
+<% end %>
+
 <% ###### Days headers ####### %>
 <% if show_days %>
   <%