server (pages): URIs handling: a page can now handle specific URIs by using uri_handlers variable: it's a dict mapping URIs (type/subtype) tuples to a callback. The callback must generate the URI path (relative to the page) including the needed URI data

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