Solargui

Updated the relative path of the images, and the images to be included in the PyPI package.

**Full Changelog**: https://github.com/AstrophysicsAndPython/SolarGUI/compare/v0.1.5...v0.1.6

What's Changed
* PR further development in the SolarGUI by AstrophysicsAndPython in https://github.com/AstrophysicsAndPython/SolarGUI/pull/7
* Added other planets' Moons
* Added super method usage
* Added images of Sun, main planets, and Pluto
* Added docstrings to functions


**Full Changelog**: https://github.com/AstrophysicsAndPython/SolarGUI/compare/v0.1.4...v0.1.5

What's Changed
* Docstrings to the program by AstrophysicsAndPython in https://github.com/AstrophysicsAndPython/SolarGUI/pull/4
* Adding menus/buttons/options for physical and orbital parameters by AstrophysicsAndPython in https://github.com/AstrophysicsAndPython/SolarGUI/pull/5


**Full Changelog**: https://github.com/AstrophysicsAndPython/SolarGUI/compare/v0.1.3...v0.1.4

What's Changed
* Edits suggested by reddit users by AstrophysicsAndPython in https://github.com/AstrophysicsAndPython/SolarGUI/pull/3


**Full Changelog**: https://github.com/AstrophysicsAndPython/SolarGUI/compare/v0.1.2...v0.1.3

Change summary
1. GUI adjustments
2. Equivalencies
3. Unit adjustments

**Full Changelog**: https://github.com/AstrophysicsAndPython/SolarGUI/compare/v0.1.2...v0.1.3
**Full Changelog**: https://github.com/AstrophysicsAndPython/SolarGUI/compare/v0.1.3...v0.1.3a0

**Full Changelog**: https://github.com/AstrophysicsAndPython/SolarGUI/compare/v0.1.1...v0.1.2