Added
- add `--version` flag which will show papermerge-cli version [Issue13](https://github.com/papermerge/papermerge-cli/issues/13)
Fixed
- Fixes exception when host name contains trailing slash [Issue15](https://github.com/papermerge/papermerge-cli/issues/15)
- auth command should not ask for password confirmation [Issue17](https://github.com/papermerge/papermerge-cli/issues/17)