Update README and example with more detailed information

README.md

@@ -5,9 +5,12 @@ redistructures ?
 Dictionary, List, Set, Queue, Counter implemented in python with redis data store under the hood
 
 ### Examples
+All examples in `example/structures.py`  
+
+Dictionary example :  
 ```python
 from redistructures import Struct
-d = Struct.dictionary()
+d = Struct.dictionary('hey')
 d['x'] = 'y'
 d['w'] = 'v'
 print(d['x'])
@@ -20,3 +23,26 @@ for v in d.values():
 for k, v in d.items():
     print(k, v)
 ```
+output  
+```
+b'y'
+True
+False
+b'dict:x'
+b'dict:w'
+b'y'
+b'v'
+b'dict:x' b'y'
+b'dict:w' b'v'
+```
+After next run 
+```
+d = Struct.dictionary('hey')
+for k, v in d.items():
+    print(k, v)
+```
+output
+```  
+b'dict:x' b'y'
+b'dict:w' b'v'
+```

example/structures.py

@@ -69,9 +69,15 @@ def test_list():
         print(e)
     print('-'*50)
 
+def test_dict2():
+    d = Struct.dictionary()
+    for k, v in d.items():
+        print(k, v)
+
 if __name__ == '__main__':
     test_dict()
     test_set()
     test_counter()
     test_queue()
     test_list()
+    test_dict2()