Adding support for downloading files from iCloud's ubiquity service.

README.md

@@ -125,7 +125,7 @@ You can access documents stored in your iCloud account by using the `files` prop
 ]
 ```
 
-And, you can access children and their children's children using the filename as an index:
+You can access children and their children's children using the filename as an index:
 
 ```python
 >>> api.files['com~apple~Notes']
@@ -145,3 +145,29 @@ datetime.datetime(2012, 9, 13, 2, 26, 17)
 >>> api.files['com~apple~Notes']['Documents']['Some Document'].type
 u'file'
 ```
+
+And when you have a file that you'd like to download, the `open` method will return a response object from which you can read the `content`.
+
+```python
+>>> api.files['com~apple~Notes']['Documents']['Some Document'].open().content
+'Hello, these are the file contents'
+```
+
+Note: the object returned from the above `open` method is a [response object](http://www.python-requests.org/en/latest/api/#classes) and the `open` method can accept any parameters you might normally use in a request using [requests](https://github.com/kennethreitz/requests).
+
+For example, if you know that the file you're opening has JSON content:
+
+```python
+>>> api.files['com~apple~Notes']['Documents']['information.json'].open().json()
+{'How much we love you': 'lots'}
+>>> api.files['com~apple~Notes']['Documents']['information.json'].open().json()['How much we love you']
+'lots'
+```
+
+Or, if you're downloading a particularly large file, you may want to use the `stream` keyword argument, and read directly from the raw response object:
+
+```python
+>>> download = api.files['com~apple~Notes']['Documents']['big_file.zip'].open(stream=True)
+>>> with open('downloaded_file.zip', 'wb') as opened_file:
+        opened_file.write(download.read())
+```

pyicloud/services/ubiquity.py

@@ -33,6 +33,13 @@ class UbiquityService(object):
         items = request.json()['item_list']
         return [UbiquityNode(self, item) for item in items]
 
+    def get_file(self, id, **kwargs):
+        request = self.session.get(
+            self.get_node_url(id, 'file'),
+            **kwargs
+        )
+        return request
+
     @property
     def root(self):
         if not self._root:
@@ -85,6 +92,9 @@ class UbiquityNode(object):
     def dir(self):
         return [child.name for child in self.get_children()]
 
+    def open(self, **kwargs):
+        return self.connection.get_file(self.item_id, **kwargs)
+
     def get(self, name):
         return [child for child in self.get_children() if child.name == name][0]