add vim temporary files to the .gitignore
add a continent field for every country in a countries.yaml file
add continent attribute to ISO3166::Country
Merge branch 'master' into continents
Merge branch 'master' into continents
add an appropriate continent for each country (according to
http://dev.maxmind.com/geoip/codes/country_continent); ISO 3166
Merge pull request #32 from lukkry/continents

add continents