Multiple improvements to the data hub:

* Making registration finer-grained so we only listen to the data we really need.
* Moving the system listener registration to an external class (for testability and readability)
* Adding a unit test (not yet complete)
* Adding documention and cleaning up comments

Still many things TODO:
* Allow pausing of registrations
* Add pause/resume to onPause/onResume of activities
* Move sampling logic out of the hub
* Optimize data reloading when display preferences change
* (maybe) move the data hub and related classes to the "content" package

scripts/i18n/src/mytracks/translate.py

@@ -0,0 +1,21 @@
+'''
+Module which prompts the user for translations and saves them.
+
+TODO: implement
+
+@author: Rodrigo Damazio
+'''
+
+class Translator(object):
+  '''
+  classdocs
+  '''
+
+  def __init__(self, language):
+    '''
+    Constructor
+    '''
+    self._language = language
+
+  def Translate(self, string_names):
+    print string_names