- use embed from the standard library instead of packr
- upgrade to sprig v3
- upgrade gomail version
- use golang-migrate instead of sql-migrate to get embed support
- use statigz to deliver compressed static assets
This commit switches from loggo to the more flexible go-logging
framework. Logs of severity INFO or higher are now written to a separate
boardvoting.log file.
Errors during execution of mail templates are now logged.
A reasoning for the vote result is now logged and put into the mail
notification when a decision is closed.
