v1.0.0 release - ES6 re-implementation

v1.0.0

Fixed

• Fixed Moon phaseQuarter bug where integer did not align with expected moon phase start.

Added

• Added phaseQuarterString property to the moon result with a descriptor of the phase ("Full Moon", etc).
• Complete test coverage for all calculated bodies.

Changed

• Refactors much of the codebase into ES6 modules, classes, and OOP patterns where easy to do.

Breaking Changes

• Added Ephemeris class to access calculations (see README for usage examples)
• Requires month range 0 - 11 on instantiation