browser (invitation, photos/album): invitation manager improvments: invitation manager has been moved to a separated module, it is generic so it can be used with other activities. It has been simplified, and contact to add are dynamically filtered using a text input. Invitation are done by email using a the new modal. New notification module is used to indicate when invitation has been done.

import os.path

version_file = os.path.join(os.path.dirname(__file__), "VERSION")
try:
    with open(version_file) as f:
        __version__ = f.read().strip()
except NotImplementedError:
    # pyjamas workaround
    __version__ = "0.7.0D"