Allows omitting the port in MB_DB_CONNECTION_URI when using Postgres and
MySQL.

Defaults to port 5432 for Postgres and 3306 for MySQL.

Insights: make datatime unit inference more robust

Async web server

Dashboard query cancellation + misc

Round the number correctly before sending it off

This fix https://github.com/metabase/metabase/issues/9072

The bug is inside the lib:
https://github.com/HubSpot/humanize/blob/master/src/humanize.js#L86
```
const number = parseInt(input, 10);
```

Fix #9072. Round up number when compact is true

Minor copy

Query Builder bugs: sorting, aggregation dimensions, field name rendering, etc

Bump Mongo to 3.4

Entities fixes

Fix oracle

Fix failing tests [ci all]

Move Logs to Troubleshooting tab