Add Consumable Items (#62)

Changes:
 + add Quantity value for items
 + add plus and minus buttons for list
 + add roll button if item contains formulas
 + decrease quantity by 1 if rolled

templates/sheets/item/item.hbs

@@ -19,6 +19,14 @@
 					</div>
 				</td>
 			</tr>
+			<tr>
+				<td>
+					<div class="flexrow">
+						<span>{{localize "midgard5.item-quantity"}}</span>
+						<input id="data.quantity" type="number" name="data.quantity" value="{{data.quantity}}">
+					</div>
+				</td>
+			</tr>
 			<tr>
 				<td>
 					<div class="flexrow">
@@ -36,6 +44,8 @@
 				</td>
 			</tr>
 		</table>
+
+		{{> "systems/midgard5/templates/sheets/item/rolls.hbs"}}
 		
 		{{> "systems/midgard5/templates/sheets/partial/mod.hbs" mods=data.mods calc=data.calc}}