add new spreadsheet template.

dream/platform/static/spreadsheet_template.html

-          <table title="Spreadsheet 1" class="jSheet ui-widget-content" border="1px" cellpadding="0" cellspacing="0">
-            <tbody>
-              <tr>
-                <td id="0_table0_cell_c0_r0" class="">Jobs</td>
-                <td id="0_table0_cell_c1_r0" class="">ID</td>
-                <td id="0_table0_cell_c2_r0" class="">Order Date</td>
-                <td id="0_table0_cell_c3_r0" class="">Due Date</td>
-                <td id="0_table0_cell_c4_r0" class="">Priority</td>
-                <td id="0_table0_cell_c5_r0" class="">Material</td>
-                <td id="0_table0_cell_c6_r0" class="">Sequence</td>
-                <td id="0_table0_cell_c7_r0" class="">Processing Times</td>
-              </tr>
-              <tr>
-                <td id="0_table0_cell_c0_r1" class=""></td>
-                <td id="0_table0_cell_c1_r1" class=""></td>
-                <td id="0_table0_cell_c2_r1" class=""></td>
-                <td id="0_table0_cell_c3_r1" class=""></td>
-                <td id="0_table0_cell_c4_r1" class=""></td>
-                <td id="0_table0_cell_c5_r1" class=""></td>
-                <td id="0_table0_cell_c6_r1" class=""></td>
-                <td id="0_table0_cell_c7_r1" class=""></td>
-              </tr>
-              <tr>
-                <td id="0_table0_cell_c0_r2" class=""></td>
-                <td id="0_table0_cell_c1_r2" class=""></td>
-                <td id="0_table0_cell_c2_r2" class=""></td>
-                <td id="0_table0_cell_c3_r2" class=""></td>
-                <td id="0_table0_cell_c4_r2" class=""></td>
-                <td id="0_table0_cell_c5_r2" class=""></td>
-                <td id="0_table0_cell_c6_r2" class=""></td>
-                <td id="0_table0_cell_c7_r2" class=""></td>
-              </tr>
-              <tr>
-                <td id="0_table0_cell_c0_r3" class=""></td>
-                <td id="0_table0_cell_c1_r3" class=""></td>
-                <td id="0_table0_cell_c2_r3" class=""></td>
-                <td id="0_table0_cell_c3_r3" class=""></td>
-                <td id="0_table0_cell_c4_r3" class=""></td>
-                <td id="0_table0_cell_c5_r3" class=""></td>
-                <td id="0_table0_cell_c6_r3" class=""></td>
-                <td id="0_table0_cell_c7_r3" class=""></td>
-              </tr>
-            </tbody>
-          </table>

dream/platform/static/spreadsheet_template.json

+[
+  [
+    "Jobs",
+    "ID",
+    "Order Date",
+    "Due Date",
+    "Priority",
+    "Material",
+    "Sequence",
+    "Processing Times"
+  ]
+]