add redis as cache

Author: ochom

cache/cache.go

@@ -18,6 +18,11 @@ type Cache interface {
 
 var conn Cache
 
+func init() {
+	// initially set cache to memory unless explicitly defined in the Init function below
+	conn = newMemoryCache()
+}
+
 // NewCache ...
 func Init(driver CacheDriver, url ...string) {
 	switch driver {