Add rates_updated_at attribute
switched to 1.9.3
switched to the more secure form of calling ruby gems
Merge branch 'rates_updated_at' of https://github.com/laurens/eu_central_bank
updated the readme
bumped the version
forgot about the change in readme and changelog
updated travis image
not supporting 1.9.2
Merge branch 'rates_updated_at'
Merge remote-tracking branch 'upstream/master'