Ukraine: Updated security information

Latest update: The Advisories and Security tabs (clashes on february 18, maintain a low profile and remain indoors) as well as the Help Abroad tab (Embassy closed until further notice).
Risk level: Exercise a high degree of caution

http://travel.gc.ca/destinations/ukraine?utm_source=ukraine&utm_medium=travel_en&utm_campaign=mailout_links&utm_content=2014-02-18%2003:09%20pm