Setting the UTF-8 encoding explicitly, regardless of the system locale settings.
Clients with unsupported locales usually fall back to US-ASCII which makes the converters fail.

Can be simulated with:

    bundle exec ruby -E 'US-ASCII' -S rspec spec
Bumped version to 0.0.6
Merge pull request #2 from crealytics/master

force UTF-8 encoding while parsing CSV file