Missing `gin upload` documentation details

When running `gin upload ` it is not clear from the documentation that this operation includes a `gin commit `. E.g. `gin upload --help` yields the following example, indicating only previously committed changes will be uploaded.

```
Examples:

Upload all previously committed changes to remote named 'labdata'
$ gin upload --to labdata
```

I think the documentation should clearly state, that `gin upload` runs`gin commit` first.

This issue refers to the GIN command line client 1.11 Build 001459 (103e923620de08ff77cf290e0b840a6d66cebfe1)