adding a new option to define the cache type

README.md

@@ -61,3 +61,7 @@ Flask-Common automatically configures [WhiteNoise](http://whitenoise.evans.io) t
     app.config['COMMON_POWERED_BY_DISABLED'] = 1
     app.config['COMMON_PROCESSED_TIME_DISABLED'] = 1
 
+## Cache configures
+ By default *simple* is a default cache type. But can you change this options, following below steps. [Flask-Cache](https://pythonhosted.org/Flask-Cache/#configuring-flask-cache)
+
+    app.config['COMMON_CACHE_TYPE'] = "simple"

flask_common.py

@@ -113,7 +113,7 @@ class Common(object):
                 # Configure WhiteNoise.
                 app.wsgi_app = WhiteNoise(app.wsgi_app, root=url_for('static', filename='')[1:])
 
-        self.cache = Cache(app, config={'CACHE_TYPE': 'simple'})
+        self.cache = Cache(app, config={'CACHE_TYPE': app.config.get("COMMON_CACHE_TYPE", 'simple')})
 
         @app.before_request
         def before_request_callback():