Update startpage.py

[nkran9]

**

Duckduckgo(SearchEngine):

'''Searches duckduckgo.com'''

def __init__(self, proxy=PROXY, timeout=TIMEOUT):
    super(Duckduckgo, self).__init__(proxy, timeout)
    self._base_url = u'https://links.duckduckgo.com{}&biaexp=b&msvrtexp=b&videxp=a&nadse=b&tjsexp=b'
    self._main_url = u'https://duckduckgo.com/?q={}&t=h_'
    self._current_page = None

**