Data export API

Files:

export_w16_1996.html
dump_w8_1997.html
new_users_w12_1999.html
clients_w44_2000.html
registrations_w39_2002.html
passwords_w1_2003.html
users_w49_2005.html
food_w35_2007.html
data_w45_2009.html
extensions_w10_2010.html