Added admin pages for failures and success.

SAVE_LIMIT can now be set to limit the amount of saved tasks results.

django_q/apps.py

@@ -6,14 +6,28 @@ class SessionAdminConfig(AppConfig):
     name = 'django_q'
     verbose_name = "Django Q"
 
-
+"""
+Sets the logging level for the app
+"""
 try:
     LOG_LEVEL = settings.Q_LOG_LEVEL
 except AttributeError:
     LOG_LEVEL = "INFO"
 
+"""
+Using Django's secret key to sign task packages
+"""
 try:
     SECRET_KEY = settings.SECRET_KEY
 except AttributeError:
     SECRET_KEY = 'omgicantbelieveyoudonthaveasecretkey'
 
+"""
+SAVE_LIMIT limits the amount of successful task executions saved to the database.
+Set this to 0 for no limits.
+Failures are not limited.
+"""
+try:
+    SAVE_LIMIT = settings.Q_SAVE_LIMIT
+except AttributeError:
+    SAVE_LIMIT = 100