Merge pull request #5 from weiji14/unpin-pandas

Unpin pandas and minor fixes to pyproject.toml file

updating pandas to unblock cryocloud

preparing for new release

updated doc infra

prepare release v0.1.7

bumped version to 0.1.6

updated changelog and bumped minor version

fix cli, handle empty output directory parameter

tagging for release v1.2.3

initial features working