6.1.0 release

What's Changed

🚀 New Features

• hide elections that are not the voter's by @edulix in #237
• adding timezone to the ballot ticket by @edulix in #240

🛠 Bug Fixes

• Fix invalid & blank vote in review screen by @edulix in #229
• fix css for warning-demo in demo voting booth: it was not being shown by @edulix in #233

🛡 Security Updates

• Bump grunt from 1.4.1 to 1.5.2 by @edulix in #231
• Bump grunt from 1.5.2 to 1.5.3 (#239) by @edulix in #241

Full Changelog: 6.0.2...6.1.0