Umlauts gets corrupted, when using x2g command

[matejvelikonja]

Problem happens in google_drive gem version 0.3.8. When using command x2g, all umlauts are corrupted in google drive spreadsheet.

Downgrading to google_drive version 0.3.6 works.

Haven't tried version 0.3.7.

[zigomir]

Cool! Please create a PR and I'll be glad to merge it if you want that change to be in this repo ;)