cosmetic changes in training plan presentation

rowers/templates/instantplan.html

@@ -17,11 +17,16 @@
     </p>
     {% endif %}
     <p>Plan length: {{ plan.duration }} days</p>
+    {% if plan.description %}
     <p>{{ plan.description }}</p>
-    <p>{{ plan.target }}</p>
+    {% endif %}
+    {% if plan.goal %}
     <p>Goal: {{ plan.goal }}</p>
-    <p>{{ plan.hoursperweek }} hours per week</p>
-    <p>{{ plan.sessionsperweek }} sessions per week</p>
+    {% endif %}
+    {% if plan.target %}
+    <p>What the plan will achieve: {{ plan.target }}</p>
+    {% endif %}
+    <p>Weekly volume: {{ plan.hoursperweek }} hours per week over {{ plan.sessionsperweek }} sessions.</p>
   </li>
   <li class="grid_2">
     <p>