Implementing support Input / Output / Streams.

As the ability to work with various file cache was necessary for me, I added this functionality, create the model example and I hope your review and incorporation of my work.

```
 ACache cache = new ACache(this);
 try {
     // creating cache

     OutputStream ostream = cache.put("myFileName");
     ostream.write("some bytes".getBytes());
    
     // now update cache!
     ostream.close();

     // open cache

     InputStream stream = cache.get("myFileName");
     stream.close();

 } catch(FileNotFoundException e){
      e.printStackTrace()
 }
```