add cursorToStreet method body

Signed-off-by: constpetrov <constant.petrov@gmail.com>
add cursorToArea method body

Signed-off-by: constpetrov <constant.petrov@gmail.com>
add cursorToStreetHistory method body

Signed-off-by: constpetrov <constant.petrov@gmail.com>
add cursorToAreaHistory method body
add code field to AreaHistory

Signed-off-by: constpetrov <constant.petrov@gmail.com>