fixed #10 Ubuntu USN is now matching against the proper os_string and not just app_name and app_version
fixed #11 Microsoft decided to change the column field by 1, so the cve field was containing the word yes, instead of a list of cve_ids
Added the latest ubuntu usn html pages to parse
fixes #13 I did not realize that microsoft by default stores all datetime values as floats in excel
fixes #12 We are now returning the 3 follwoing extra keys in the application api: cve_ids, vulnerability_id, and vulnerability_categories