Version 0.1.6

What's Changed

• add a --bbox option to s1_info for frame bounds by @scottstanie in #88
• s1_orbit.py: if autodownloading, create the directory by @scottstanie in #100
• allow az_step/rg_step arguments to as_isce3_radargrid by @scottstanie in #102
• Two layered az fm mismatch rate by @seongsujeong in #101
• use radargrid step parameters to simplify _steps_to_vecs by @scottstanie in #107
• 0.1.5 -> 0.1.6 for gamma delivery by @seongsujeong in #110

Full Changelog: v0.1.5...v0.1.6