Version 0.1.5

Just a quick release to catch-up with things 👐

What's new? Not much.

• Build pilad with Go 1.10
• Test project in TravisCI against Go 1.9.x and 1.10
• Replace gvt with dep
• Update dependencies
• Introduce go.mod file. See https://research.swtch.com/vgo-intro

See the full diff here: v0.1.4...v0.1.5