v0.26.0

Changelog

• Merge pull request #88 from imup-io/phanyzewski/post-release-updates (@phanyzewski)
• docs: log file description (@stevenaldinger)
• feat: configurable log file path (@phanyzewski)
• feat: on startup, send the first data point collected (@phanyzewski)
• fix: add test for log file path (@phanyzewski)
• fix: file path (@stevenaldinger)
• fix: include client_version in connectivity data (@phanyzewski)
• fix: remove uneeded public functions (@phanyzewski)
• fix: review comments (@phanyzewski)
• fix: tag local builds via makefile with the current relase marked as -dev (@phanyzewski)
• fix: update github.com/m-lab/ndt-server (@phanyzewski)
• fix: update github.com/prometheus-community/pro-bing (@phanyzewski)