Offline CP calculations for OTW

A new table in the database with precalculated CP values. The data
are updated through RQ/Celery asynchronous functions

rowers/models.py

@@ -641,7 +641,18 @@ attrs.update(strokedatafields)
 StrokeData = type(str('StrokeData'), (models.Model,),
                   attrs
                   )
-    
+
+# Storing data for the OTW CP chart
+class cpdata(models.Model):
+    delta = models.IntegerField(default=0)
+    cp = models.FloatField(default=0)
+    user = models.IntegerField(default=0)
+
+    class Meta:
+        db_table = 'cpdata'
+        index_together = ['user']
+        app_label = 'rowers'
+
 # A wrapper around the png files
 class GraphImage(models.Model):
     filename = models.CharField(default='',max_length=150,blank=True,null=True)