"address" argument on LEDs #422 (#446)

* "address" argument on LEDs #422

* Update git_version.py for ev3dev2 directory

* Improve Led and Leds __str__

ev3dev2/led.py

@@ -78,12 +78,9 @@ class Led(Device):
     'desc',
     ]
 
-    def __init__(self, address=None,
+    def __init__(self,
                  name_pattern=SYSTEM_DEVICE_NAME_CONVENTION, name_exact=False,
-                 desc='LED', **kwargs):
-
-        if address is not None:
-            kwargs['address'] = address
+                 desc=None, **kwargs):
         super(Led, self).__init__(self.SYSTEM_CLASS_NAME, name_pattern, name_exact, **kwargs)
 
         self._max_brightness = None
@@ -95,7 +92,10 @@ def __init__(self, address=None,
         self.desc = desc
 
     def __str__(self):
-        return self.desc
+        if self.desc:
+            return self.desc
+        else:
+            return Device.__str__(self)
 
     @property
     def max_brightness(self):
@@ -282,6 +282,9 @@ def __init__(self):
             for led_name in value:
                 self.led_groups[key].append(self.leds[led_name])
 
+    def __str__(self):
+        return self.__class__.__name__
+
     def set_color(self, group, color, pct=1):
         """
         Sets brigthness of leds in the given group to the values specified in

git_version.py

@@ -71,8 +71,8 @@ def git_version(abbrev=4):
     if version != release_version:
         write_release_version(version)
 
-    # Update the ev3dev/version.py
-    with open('{}/ev3dev/version.py'.format(os.path.dirname(__file__)), 'w') as f:
+    # Update the ev3dev2/version.py
+    with open('{}/ev3dev2/version.py'.format(os.path.dirname(__file__)), 'w') as f:
         f.write("__version__ = '{}'".format(version))
 
     # Finally, return the current version.