pages (files/list): comments handling + size parameters: comments are now handled if comments_url is set. 2 new parameters allows some customization: data['size'] is the size hint to retrieve thumbnails data['retrieve_comments'] indicate if comments must be fetched if the count is > 0.

try:
    from common.constants import Const as C
except ImportError:
    pass # import doesn't work at this stage with pyjamas
else:
    __version__ = C.APP_VERSION