pylunar 0.6.0

Drop Python 2 and 3.4 and 3.5 support

Add Python 3.7 and 3.8 support

Change to 3-clause BSD license

Switch to pytest from tox

Add Github workflows for build and package upload

Remove Travis

Add changelog updates

LunarFeature additions

• Latitude and Longitude ranges

• Feature angle

MoonInfo additions

• Libration phase angle

• Libration visibility check

• Updated is_visible to use libration visibility check

Corrected moon state after rise/set function call

Made landing sites always visible once visible

Added landing sites to feature database

Expanding LunarFeature content

MoonInfo object additions

• right ascension and declination

• solar elongation

• earth distance

• rise, transit and set times

• angular size

• magnitude

• sub-solar latitude

Ensure feature DB included in package

MoonInfo object additions

• time of day

• is feature visible

LunarFeatureContainer object changes

• Made constructor club related

• Load call can check if feature is visible using MoonInfo instance

Changed mechanism to determine phase name

MoonInfo object additions

• phase name

• time from new moon

• time to new moon

• time to full moon

MoonInfo object that provides basic lunar information

• age

• altitude

• azimuth

• colongitude

• fractional phase

• libration latitude

• libration longitude

• next four lunar phases